Cattle : Definition, Meaning, Description &Breeding


 Cattle defined as domesticated quadrupeds held as property or raised for use

specifically bovine animals on a farm or ranch

Cattle are raised to produce beef, veal, and dairy products

Cattle (Bos indicus and B. taurus) are the most common and widespread species of large ruminant livestock and are raised primarily to produce milk, meat and hides and to provide draft power.

A breed is a race or variety related by descent and similarity in certain distinguishable characteristics. More than 250 breeds of cattle are recognized throughout the World. 

In Africa there are two main races of Cattle: Bos indicus (cattle with humps) including the Boran, Sahiwal and Zebu cows (indigenous) and the Bos taurus (exotic or imported breeds). The two races can cross breed, and the crosses can be very productive both in terms of growth rates for beef, improved milk production as well as disease resistance.

Some agro-ecological zones (AEZ’s) are not suitable for pure breed high yielding milk cows, but can benefit from crossbreeding the local breeds of cattle with exotic breeds. However, this will only be useful if management practices such as improved feeding, plenty of fresh water available, and a reliable source of veterinary drugs are available. Without these conditions the survival rate of exotic breeds and cross breeds is likely to be low. This should be one of  the first things to consider in a breeding plan: what animal breed fits best to the circumstances on the farm.

Whether indigenous breeds or exotic breeds or crossbreeds will perform best depend amongst others on the climate, the occurring diseases, the available feed resources and the availability of fresh water.

Exotic breeds are more expensive to buy and require more sophisticated housing facilities. The indigenous breeds are in general more hardy and used to the circumstances, less sensible for diseases and less demanding for quality feed. The production is low, but in most farms the potential is not fully used. Under sub-optimal conditions the indigenous breeds stay healthy and animal welfare is less at risk as with exotic breeds in the same situation. Although production is low, it might be more economically profitable to have indigenous breeds instead of exotic breeds because the needs in feed and healthcare are lower. Breeding possibilities in isolated areas are less than in areas with good infrastructure. Use of local breeding bulls instead of artificial insemination could be a limiting factor in improving the production of local cattle. Working together as farmers group and take initiatives as a group could be advantageous.

Milk Breeds:

a) Friesian breed

The exact origins of the breed are difficult to determine but it is known that in the 18th century, herds of small black-and-white cattle were brought into northern Holland and Friesland from northern Jutland to replace animals that had fallen victim to disease and flooding. These animals were crossed with the existing Dutch cattle and formed the basis of the Friesian.
Before the establishment of the Netherlands herd book in 1873 and the Friesland herd book in 1879, both black-pied and red-pied animals were maintained separately. The preference for black-pied cattle, particularly in the United States, led to the further segregation of red-pied animals and presently this colour variation only exists in small number in the Netherlands

Production levels of this breed declined during the 1950’s when excessive emphasis was placed on correct colour pattern. During the 1970’s Holsteins were imported from the United States and used to improve the milk production. This resulted in larger animals with a more pronounced dairy characteristics. The mixing of these two breeds is such that now many Friesians are 25% to 75% Holstein.

The modern Friesian is pre-eminently a grazing animal, well able to sustain itself over much lactation, on both low lying and upland grassland, being developed by selective breeding over the last 100 years. Some outstanding examples of the breed have 12 to 15 lactations to their credit, emphasizing their inherent natural fecundity. In response to demand, protein percentages have been raised across the breed and herd protein levels of 3.4% to 3.5% are not uncommon.

Typical characteristics include:

Purpose: Milk production
Potential yield: 40-50 litres milk/day, 3,2% butter fat.
Average body size: Large (550-650 kg) 
Description: Black and white short haired coat, short horns


  • High milk production potential with low butter fat content of about 3.2%
  • Note: Milk production will depend on level of feeding and other management. Heifers generally come into milk at about two years of age.
  • Suitable for zero grazing
  • Frequent calving in their lifetime, longevity, so need less replacements
  • Provide valuable male calves
  • Have lower cell counts
  • They are known for their versatility: they provide high quality milk and high quality lean meat


  • Heavy feeder
  • Need high level management
  • Susceptible to diseases, susceptible to milk fever
  • Susceptible to high temperatures 
  • Feed requirements high (90-110 kg fresh forage/day i.e. 3 gunny bags)
  • Adequate clean water (min 60 lts/day, more for heavy yielders) a)Ayrshire breed The Ayrshire breed originated from the county of Ayr in Scotland, prior to 1800. The breed was introduced to Kenya in 1908 from South Africa. It has been developed over the last century through inputs of bloodlines from Britain, South Africa, Sweden, New-Zealand, Canada and USA.  Kenya Aryshire cattle breeders emphasize on medium cow balanced for type, production, longer life and fertility. Ayrshire population in Kenya is estimated to be over 1.2 million of which nearly 30’000 are registered. Typical characteristics include:
  • Purpose: Milk production. Ayrshire milk is referred as “the ideal drinking milk”; it is not excessively rich, not lacking adequate fat, and it possesses desirable quantities of proteins.
  • Potential yield: 30 litres/day, 4,7% butter fat, depending on feeding and management.
  • Average yield: 10 litres/day
  • Average body size: Large (average live-weight 450 kg)
  • Description:
  • Body colour: Brown and white patches in almost equal amounts with some cows tending to dark mahogany colour
  • Prominent strongly attached and balanced udders
  • Strong loins, long stooping from hip to pin bones
  • Good spring of ribs and deep body capacity Advantages: 
  • High milk production potential (30 litres/day),butter fat of 4.7%. Heifers generally come into milk at about two years of age.
  • Fairly hardy and adaptable to varied agro-ecological zones (AEZs)
  • They are easy calving
  • They are relatively resistant to diseases and free of genetic diseases
  • Better suited to range management than the Fresian breed Disadvantages:
  • Feed requirements high (90-110 kg fresh forage/day i.e. 3 gunny bags)
  • Need plenty of clean water (60 litres/day) b)Guernsey breed The Guernsey originated on the small Isle of Guernsey, situated in the English Channel just off the coast of France. There is no concrete evidence as to the development of the Guernsey before the 19th Century but there may be some truth in the theory that the Isigny cattle of Normandy and the Froment du Léon breed from Brittany were ancestral relatives of the modern Guernsey.
  • Purpose: Milk production. Heifers generally come into milk at about two years of age.
  • Potential yield: 25 litres/day and 4.3% butter fat.
  • Average body size: Medium (average live-weight 475 kg).
  • The bull weighs 600 to 700 kg. The average weaning weight of heifers and bull calves is 75 kg. Description: 1. The colour of the Guernsey varies from yellow to reddish-brown with white patches.  2. They have a finely tuned temperament, not nervous or irritable. 3. Physically the breed has good dairy conformation and presents the visual impression of a plain animal bred for utility rather than good looks. 4. They have an attractive carriage with a graceful walk, a strong back, broad loin, wide rump and deep barrel, strong, attached udder extending well forward, with the quarters evenly balanced and symmetrical. 5. The Guernsey bull has an attractive individuality, revealing ample vigour and masculinity. It has smooth-blending shoulders showing good refinement, strength and even contour. Advantages:  1. High milk production potential (25 lts/day) with moderate butter fat content 4.3%. 2. Feed requirements: Moderate (65-85 kg fresh forage/day i.e. 2 gunny bags) 3. Guernsey are efficient converters of feed to product, being of intermediate size, Guernsey produce their high quality milk while consuming 20 to 30 percent less feed per pound of milk produced than larger dairy breeds.  4. Guernsey reach reproductive maturity at an early age and can calve at 22 months of age. This provides an early return on investment.  5. Guernsey produce calves big at birth, which are easy to rear.  6. Guernsey are well known for having the minimum of calving complications.  7. Guernsey are adaptable to all climates and management systems and lack any known undesirable genetic recessives.  8. Her fawn and white coat enhances her heat tolerance and reduces heat stress, which adds to her ability to maintain production levels anywhere.  9. They are docile and have an ideal Dairy Temperament.
    • Disadvantages:  1. Need plenty of clean water (40 lts/day) d) Jersey breed Despite considerable research, nothing definite is known as to the actual origin of the cattle first brought to Jersey Island. Most research agrees that the Jersey probably originated from the adjacent coast of France, where in Normaaling Jerseys are found.
  • Purpose: Milk production.
  • Average yield: 22 litres/day and 6.3% butter fat.
  • Average body size: Small – medium (350 Kg) Description:  1. Jerseys in Kenya are typically light brown in colour, though this can range from being almost grey to dull black. They can also have white patches which may cover much of the animal. A true Jersey will however always have a black nose bordered by an almost white muzzle.  2. They have protruding eyes. 3. This breed is well known for milk with high quality – it is particularly richer in fat, protein, minerals and trace elements than those from the larger dairy breeds. The milk is also rich in colour which is naturally produced from carotene. 4. Milk production potential is moderate (20 lts/day), depending on feeding and management regime. Advantages:  1. Feed requirements is relatively low (65-85 kg fresh forage/day i.e. 2 gunny bags).  2. Milk has high butter fat content 5.2%. 3. It is hardy and adaptable to varied AEZs. 4. The Jersey’s hard black feet are much less prone to lameness. 5. They perform well under a wide range of systems and are well-known for their high feed conversion efficiency. 6. Jerseys generally produce milk components at a lower cost compared to the other major breeds. 7. They stay in the herd longer than any other dairy breed. Her milk has greater nutritional value, plus the highest yield and greater efficiency when processed into cheese and other value-added products. 8. The breed has little or no calving problems, greater fertility, a shorter calving interval, and earlier maturity.  9. Also suitable for cross breeding/ improving local breeds. Disadvantages:  1. Susceptible to milk fever and tick borne diseases Dual Purpose Breeds
  • Purpose: Meat and milk production
  • Average body size: Large (average live-weight 750 kg)
  • Description: Body color brown and white or black and white Advantages: 1. High production potential with good management and good feeding Disadvantages:
  • Susceptible to tick borne diseases.
  • Only suitable for cool areas with year round quality fodder availability.
  • Potential milk yield: low to moderate (10-15 liters/day).
  • High forage requirement b) Boran breed By careful selection and application of the strict standards of excellence of the Boran Cattle breeders Society, the Boran breed has been developed into an ideal beef animal suitable for the arid range areas to be found in many parts of the world. 
  • The original strains of the breed came from Ethiopia and were adopted early in the 20th Century by commercial cattlemen in Laikipia, Machakos and the Rift Valley Districts of Kenya. The Boran society was formed in 1951 and its panel of inspectors continues to ensure that the breed progresses and keeps up to date with the demands of modern beef production. The society promotes exports of embryos world wide and semen is exported throughout the East African region.
  • Purpose: Meat and milk production
  • Average body size: Medium (Average live-weight is 350-400 kg) Description:  The Boran is typically white in colour with dark points and pigmented generally black skin. Steel-grey with black points is not uncommon. Fawn and red also occur, but black is rare and is not considered a true Boran colour. The Breed standard permits all colours except brindle. The head is carried well, of medium length and slightly convex. Ears are small in comparison with the Indian breeds and not pendulous. Horns are generally short, round in cross- section and upright, but there is some variation in size and length. Polled animals are not uncommon and some animals have been selected for this condition. The hump is well defined and thoracic; it is larger in the male than in the female. The Boran shows a surprisingly straight top line for a Zebu animal. The well-developed hindquarters have frequently been remarked upon. The rump is long, wide and muscular in the male and the buttocks are well fleshed. Among Zebu breeds the Boran is outstanding in this character. Skin is generally thin, with loose folds and pliable. Both the dewlap and umbilical folds are well developed. The Boran is generally vigorous and alert. Being accustomed to desert condition, it covers vast distances in search of grazing and water and in some areas is only watered on alternate days or on the third day. Fertility Boran produce a calf a year. Even under harsh conditions the Boran cow will continue to breed and rear calves and do this without punishing herself. One explanation for this high fertility is that the cow has relatively low body weight loss over the suckling period, thereby maintaining a good condition, thus able to conceive again. Longevity  Boran cattle live a long time. It is quite normal for 15 years old breeding cows to be sound mouthed and it is also on record that a 16 year old Boran bull is still producing high quality semen for artificial insemination. Temperament  Boran cattle are recognized as being generally quiet, docile and easy to handle. This trait has developed over many generations of cattle living close to man. Beef production and Carcass Quality  Average weight gains per day on grass & feedlot: Grass = 0.7 – 1.0 kg depending on grass quality. Feedlot = 1.3 kg per day depending on type of cross used (this was found at a recent trial at Marania Farm – Timau where using Boran cross Angus steers & heifers). Trials in Nebraska, USA, show that the Boran and its crosses score consistently better than other Zebu breeds for meat tenderness, carcass marbling and rib eye area. Butchers in Kenya prefer Borans and their crosses for this reason. Disease resistance  The Boran has a useful degree of host resistance to ticks and it is reported that the breed is ‘completely resistant to buffalo fly’. Borans are generally less affected by foot and mouth diseases than exotics and recover faster. It is also clear that the morbidity and mortality rates of East Cost Fever are lower in Boran than in Boss taurus breeds; the Boran being naturally more resistant.  Survival Characteristics  Being an animals which in obliged to walk long distances, selection for perfect feet and leg conformation is necessary for registered cattle. The herd instinct of the Boran makes it very easy to manage in bush country. They are noted for being able to ‘graze on the trot’ and they will always stay together. The cow has a well-carried udder with strong attachments and neat, small teats. Boran heifers reach puberty at an average age of 13 months. She is an excellent mother, not only will she feed her calf so well that high weaning weights are attainable, but she guards against predators, and will never allow her calf to get lost in the bush. Calving problems hardly exist. Calves at birth weigh an average of 28 kg for males and females, 25 kg. Boran cattle have developed adaptive traits of crucial importance for their survival. Some of these characters are – the ability to withstand periodic shortage of water and feed, ability to walk long distances in search of water and feed and ability to digest low quality feeds. The well-developed beef conformation shows up in carcass appraisals. The depth of eye muscle, marbling, even fat cover and ratio of hind to forequarter make the Boran difficult to beat, hence the preference of Kenya butchers for young, well-finished Boran steers. Advantages: 1. Docile 2. Milk has high butter-fat of 4.8% 3. Good breeds for marginal areas Disadvantages:  1. Milk production potential is low (10 liters/day) 2. Difficult breeders, most mating at night c) Sahiwal breed This Zebu breed originates from India and Pakistan. National study was established in 1963 in Naivasha with the purpose of improving the breed for milk and beef i.e. as dual purpose breed. For a long time the breed was confined to government farms where the focus was conservation, characterization, improvement and utilization in smallholder systems. This breed is adapted to utilization of of poor quality pasture and rough terrain. Purpose:  Meat and milk production The milk yield is highly variable because of variation of management regimes. Yields may range from 5-10 litres/day Average body size: Large (average live-weight 350-400 kg) Description:  Body colour is solid brown  Advantages:  1. Docile.  2. Good breeds for marginal areas. 3. Milk has high butter-fat of 4.8% Disadvantages:  1. Milk production potential is low (10 Kg/day)  2. Difficult breeders, most mating at night Purpose: Meat production Average body size:  Large (average live-weight 550 kg) Description:  Body color reddish brown body with white head and feet Advantages:  1. Good beef conformation for the discerning consumer.  Disadvantages:  1. High forage requirement 2. As all exotic breeds Hereford is susceptible to tick borne diseases.  3. Only suitable for cool areas with year round quality fodder availability. Purpose:  Meat production Average body size:  Large (average live-weight 800 kg) Description:  Body color white Advantages:  1. High production potential with good management and good feeding.  2. Good beef conformation for the discerning consumer.  Disadvantages:  1. Susceptible to tick borne diseases.  2. Only suitable for cool areas with year round quality fodder availability. Breeding CattlePlanned breeding programs yield the best results when the breeder considers the production and other trait characteristics in individual cows and how they can be passed on to offspring. The breeder must also be able to match these characteristics to what the market demands. InbreedingInbreeding  May be defined as mating of individuals more closely related than the average relationship of the population. The decrease in fitness that results from such inbreeding is known as inbreeding depression.
  • In small herds inbreeding is a  real danger for continued productivity of livestock. Inbreeding can lead to smaller animals, less productive animals, high incidences of deformities and low disease resistance among other undesirable characteristics.
  • By having a good breeding strategy such inbreeding can not only be totally avoided, but the opposite can be achieved namely higher productivity, better milk and meat yields, healthy animals with good disease resistance, just to mention a few of the most common goals for breeding strategies
  • Farm animals are very sensitive to inbreeding, and usually full-sibling matings should not be done because of a marked decrease in viability and fertility. Breeding within small populations, such as a herd, without introduction of new animals from outside (not related to the herd or flock), leads automatically to a certain amount of inbreeding.
  • All cows and bulls, even the very best bull, in any breed, have genetic traits that could be desirable or undesirable from a farmers perspective. The problem arises when from in both parents  the genetics for the same undesired traits are present Imagine that this trait is present in a particular bull, and that bull is very popular (because he also has some desirable trait, such as superior milk production in daughters). As this bull is bred to many females, half of the resultant offspring would now carry the undesired trait possessed by that bull. If these individuals are mated to one another, then 25% of their offspring would have double the undesired trait (one from each parent), and another 50% would carry the undesired trait in their genetic base. In this extreme form of inbreeding, in just two generations the defect went from being expressed in one out of all the animals to one out of every four animals, with three-quarters of the animals now carrying the defect.
  • In farm animals, each male may be used to serve a large number of females, and under such conditions the increase of the inbreeding coefficient per generation in a closed breeding unit can be estimated simply by dividing 100 by eight times the number of males used. Thus, when only one homebred sire is used, the decrease in heterozygosity (variability) in each generation is 12.5 percent.
  • When AI (Artificial Insemination) is used, a small number of sires again are used to serve a large number of females. Nevertheless, the reduction in heterozygosity may be relatively small in such cases, because many young sires are used for progeny testing, and several tested sires enter into service each year. The modern trend in artificial insemination is to use the tested sires for only relatively short periods of time, after which they are replaced with younger sires, which presumably have made even better records. Such rapid turnover in sires serves also to reduce the length of the generation interval in breeding programs. On the other hand, very popular bulls serve worldwide a million cows. Avoid inbreeding, use heterosis instead
  • When two lines are crossed, then any undesired traits present in one line but not in the other are masked (hidden) and there is typically a boost in the fitness of the offspring. This effect is known as heterosis or hybrid vigor, and is the opposite of inbreeding. This effect even extends to crosses between breeds of cattle, which is why crossbreeding programs are popular (for producing cattle for beef operations, for instance). Essentially, one can get many of the benefits of two breeds of cattle  in the first generation of a cross by using unrelated parent stock.
  • The cheapest way of making sure no inbreeding takes place is to:
  • Keep close breeding records of all animals in the herd
  • Make sure parents do not breed with offspring and
  • Siblings do not breed with each other
  • Use AI or natural mating – carefully noting the name of the sire providing semen at each AI service or the bull mating the cow – next to the name of the cow in your diary. So that after some time you will have a record of the family tree of every individual.
  • Make sure the same sire semen is not used on his offspring.
  • Ask your AI provider to bring different origin semen over time.
  • Overview of Breeding methodologies Inheritance of Characteristics
  • Genes determine the way animals look – the observable trait. Thus the length of ear in sheep is the expression of the genes that regulate ear length. The breeder can only plan according to the trait observed. Repeatability and heritability are two kinds of observation that the breeder can use. Repeatability:  This refers to the permanence of a type from one observation to the next. It is a measure of the extent to which superiority in any one character is maintained throughout the lifetime. Should sheep in a flock tend to rank in approximately the same order with regard to a certain character, year after year, in spite of environmental changes, the particular character is said to have high repeatability. Heritability:  This is concerned with the constancy with which the phenotype is passed from parent to offspring. It expresses the proportion of total variance which can be attributed to average effects of the genes. Alternatively, heritability is the degree of inheritance of the trait. Selection:  Individuals selected for breeding must have desirable characteristics which have good repeatability and heritability and will, therefore, be passed on to offspring. Selection aims to change the gene frequencies in order to improve the animal body types in the following generations. -Selection may be direct or indirect. The direct method selects sheep having the best expression of the trait to be improved. Indirect selection improves a trait by selecting sheep with a related trait. The effectiveness of indirect selection depends upon the correlation between two traits. This is of great importance since animal breeding usually involves more than one trait. An example of indirect selection is given by high growth rate, where selection for this trait is likely to improve early maturity and slaughter weight and also the efficiency of feed conversion. Breeding strategies Depending on your goals for breeding animals different breeding techniques can be used. The following is a brief overview of some breeding methodologies. The majority  are not practical for most people, but for the dedicated animal breeder combinations can be used depending on the breeding strategy. Crisscrossing: A continuous program of crossbreeding in which there is an alternate use of males belonging to two breeds. Using two breeds designated as P1 and P2, a crisscrossing program, beginning with the two-breed cross animal (P1 x P2), would begin by backcrossing to one of the parental breeds [(P1 x P2) x P1]. Females resulting from these matings would be bred to a P2 male, [(P1 x P2) x P1] x P2, and so on. Genus cross: Mating of animals belonging to different genera (for example, mating of domestic cattle, Bos taurus or Bos indicus, to the buffalo, Bison). Grading:  Mating of purebred males of a given breed to non-purebred females and the resultant female offspring in successive generations. Inbreeding: Mating of animals more closely related to each other than the average relationship within the breed or population concerned. Linebreeding: Generally mild form of inbreeding in which animals mated are related to some supposedly outstanding individual. Outbreeding: Mating of animals less closely related to each other than the average relationship within the breed or population concerned. Species cross: Mating of animals belonging to different species (for example mating of European breed cattle, Bos taurus, to Brahman cattle, Bos indicus). Three-breed rotational cross: A continuous program of crossbreeding in which males of three breeds are used on a rotational basis. Using three breeds designated as P1, P2 and P3, the first generation would involve production of two-breed cross animals, P1 x P2. In the second generation, two-breed cross females would be mated to males of the third breed, (P1 x P2) x P3; three-breed cross females would be mated to males of one of the breeds used to produce the two-breed cross animals, [(P1 x P2) x P3] x P1, and so on. Descriptions in breeding
  • Progeny = Offspring
  • Backcross: Progeny resulting from the mating of a two-breed cross animal to one of the parental breed
  • Crossbred: Progeny resulting from the mating of outcross animals belonging to different breeds.
  • Inbred line: Line of animals produced by mating related animals.
  • Incross: Progeny resulting from the mating of animals from different inbred lines within a breed.
  • Incrossbred: Progeny resulting from the mating of animals from inbred lines of different breeds.
  • Outcross: Progeny resulting from the mating of unrelated animals within a breed.
  • Topcross: Progeny resulting from the mating of animals belonging to different families within a breed.
  • Topcrossbred: Progeny resulting from the mating of inbred males to non-inbred females of another breed.
  • Topincross: Progeny resulting from the mating of inbred males to non-inbred females of the same breed.
  • Two-breed cross: Progeny resulting from the mating of males of one breed to females of another breed. Breeding Strategies and Plans  -Distinct objectives are essential to a breeding plan aiming to improve our livestock breeds for better future profitability such as: 1. Higher milk yield 2. Better milk composition (depends on your market) 3. Good udder or body shape 4. Higher beef/meat quality 5. Higher growth rate  (also related to good nutrition) 6. Better disease resistance 7. Better fit to available feed and other circumstances    8. Color preference 9. Polled/non polled etc.Both quantity and quality must go together for efficient production.Genes determine the way animals look. For example the coat colour in cows is the phenotypic expression of the genes that regulate coat colour. The breeder can only plan according to the trait observed. Other genes determine whether the udder will be small or large, whether the animal has horns, the size of the body etc. Some examples of simple breeding strategies we can mention: 1. To increase milk production in zebu cattle: This can be achieved by upgrading the Zebu breed with a proven exotic dairy breed (Jersey, Guernsey, Friesian) upto the fourth generation or the larger and more productive Boran or Sahiwal cow depending on disease pressure in your area. 2. To increase disease resistance in exotic dairy breeds: Introduction of animals with better resistance to disease such as Boran or Sahiwal will improve the disease resistance of the dairy breeds. The cross bred offspring may take more after one parent than the other, but there are very good experiences with such crosses. 3. Better performance within a breed: If natural breeding is practiced – exchange the bull if the offspring consistently have undesirable traits.
  • If AI is practiced – look carefully at the pictures and specifications of sires offered to determine whether the proposed sire will add better body conformation to the animal offspring. Some AI semen providers will supply pictures of offspring, with strengths highlighted.
  • The successive offspring from the initial/ subsequent crossing is the one used for successive matings and not the original dam. Selection of Individuals: Individuals selected must possess desirable characteristics which have good repeatability and heritability and will, therefore, be passed on to offspring. Selection aims to change the gene frequencies in order to improve the subsequent generations. 
  • Selection may be direct or indirect. The direct method selects cows having the best expression of the trait to be improved. Indirect selection improves a trait by selecting cows with a related trait. The effectiveness of indirect selection depends upon the correlation between two traits. This is of great importance since animal breeding usually involves more than one trait. An example of indirect selection is given by high growth rate, where selection for this trait is likely to improve early maturity and slaughter weight and also the efficiency of feed conversion. Selection of Breeding Stock Selection of breeding animals is based on: 
  • Pedigree or parentage information 
  • Performance records (Estimated breeding values and phenotype)
  • Cost of semen from proven bulls
  • Available bulls in the area
  • Then mates are assigned accordingly. Breeding technologies
  • The following methods are used in breeding: 
  • Natural mating (proven and healthy bulls where A.I. is not available) 
  • Artificial insemination (A. I.)
  • Multiple ovulation embryo transfer (MOET) (Not approved for Organic certified herds): is the process of taking embryos (fertilized ova) from a super ovulated dam (the donor) and transferring them to a surrogate dam (the recipient). This method was developed in the 1970’s and 80’s, and later modified for small ruminants, to increase the number of offspring from animals with characteristics which humans want to have in the herd. It also have some severe side effects like hormonal disturbances and that it pushes the breeding towards building on a few characteristics without considering a broad spectrum of characteristics which may be lost. It is a method which implies use of hormones in a very artificial way and therefore not relevant in herds which farm to the organic principles. 
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