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Industries & Professions /
Animal Breeders and Technicians
Most animal breeders and technicians work as livestock production technicians with cattle, sheep, swine, or horses; or as poultry production technicians, with chickens, turkeys, geese, or ducks. Other animal breeders work with domesticated animals kept as pets, such as songbirds, parrots, and all dog and cat breeds. Even wildlife populations that are kept in reserves, ranches, zoos, or aquariums are bred with the guidance of a breeder or technician. Each category of animal (such as birds), family (parrot), species (African gray parrot), and even some individual breeds within a category have technicians working on their reproduction if they are bred for livestock or domestic use. Within each of these categories the jobs may be specialized for one aspect of the animal's reproductive cycle.
For example, technicians and breeders who work in food-source bird production can be divided into specific areas of concentration. In breeding-flock production, technicians may work as farm managers, directing the operation of one or more farms. They may be flock supervisors, with five or six assistants working directly with farmers under contract to produce hatching eggs. On pedigree breeding farms, technicians may oversee all the people who transport, feed, and care for the poultry. Technicians in breeding-flock production seek ways to improve efficiency in the use of time, materials, and labor; they also strive to make maximum effective use of data-processing equipment.
Technicians in hatchery management operate and maintain the incubators and hatchers, where eggs develop as embryos. These technicians must be trained in incubation, sexing, grading, scheduling, and effectively using available technology. The egg processing phase begins when the eggs leave the farm. Egg processing technicians handle egg pickup, trucking, delivery, and quality control. With experience, technicians in this area can work as supervisors and plant managers. These technicians need training in egg processing machinery and refrigeration equipment.
Technicians in poultry meat production oversee the production, management, and inspection of birds bred specifically for consumption as meat. Technicians may work directly with flocks or in supervisory positions.
Poultry husbandry technicians conduct research in breeding, feeding, and management of poultry. They examine selection and breeding practices in order to increase efficiency of production and to improve the quality of poultry products.
Egg candlers inspect eggs to determine quality and fitness for incubation according to prescribed standards. They check to see if eggs have been fertilized and if they are developing correctly.
Some poultry technicians also work as field-contact technicians, inspecting poultry farms for food-processing companies. They ensure that growers maintain contract standards for feeding and housing birds and controlling disease. They tour barns, incubation units, and related facilities to observe sanitation and weather protection provisions. Field-contact technicians ensure that specific grains are administered according to schedules, inspect birds for evidence of disease, and weigh them to determine growth rates.
For other livestock, the categories are similar, as are the range of jobs. For nonfarm animals, the average breeder works with several animals within a breed or species to produce offspring for sale. Although there are ranches that produce a large number of exotic animals and some stables and kennels that run full-staff breeding operations, most breeders for pets work out of their homes. There are also production shops, usually referred to as puppy mills, that produce pets for sale but do so without much regard to the quality or well-being of the animals they are producing. Such operations are dismissed as unprofessional by established breeders and usually challenged by local authorities for quality of care provided to the animals, which sometimes amounts to abusive treatment.
One area of animal production technology that merits special mention because of the increasing focus on its use in animal husbandry is that of artificial breeding. Three kinds of technicians working in this specialized area of animal production are artificial-breeding technicians, artificial-breeding laboratory technicians, and artificial insemination technicians.
Artificial breeding can be differentiated by the goal of the breeder: food (poultry and cattle), sport (horses and dogs), conservation (endangered species kept in captivity), and science (mice, rabbits, monkeys, and any other animals used for research). Breeders work to create better, stronger breeds of animals or to maintain good existing breeds.
Because of the increasing cost of shipping adult animals from location to location to keep the gene pool diverse in a species or breed, animal breeders have developed successful methods of shipping frozen semen to allow breeding across distances. This has allowed zoos to build animal populations, such as the elephant, rhinoceros, and hippopotamus, with good genetic diversity without the overwhelming difficulty of transporting a several-thousand-pound male over expressways to attempt breeding with a new female to which he may or may not be attracted. The technician is able to eliminate problem samples before insemination occurs because semen can be examined microscopically.
Artificial-breeding technicians collect and package semen for use in insemination. They examine the semen under a microscope to determine density and motility of sperm cells, and they dilute the semen according to standard formulas. They transfer the semen to shipping and storage containers with identifying data such as the source, date taken, and quality. They also keep records related to all of their activities. In some cases they may also be responsible for inseminating the females.
Artificial-breeding laboratory technicians handle the artificial insemination of all kinds of animals, but most often these technicians specialize in the laboratory aspects of the activity. They measure purity, potency, and density of animal semen and add extenders and antibiotics to it. They keep records, clean and sterilize laboratory equipment, and perform experimental tests to develop improved methods of processing and preserving semen.
Artificial insemination technicians do exactly what their name implies: They collect semen from the male species of an animal and artificially inseminate the female. Poultry inseminators collect semen from roosters and fertilize hens' eggs. They examine the roosters' semen for quality and density, measure specified amounts of semen for loading into inseminating guns, inject semen into hens, and keep accurate records of all aspects of the operation. This area of animal production is expected to grow as poultry production expands.
Whether the breeding is done artificially or naturally, the goals are the same. Cattle breeders mate males and females to produce animals with preferred traits such as leaner meat and less fat. It is desirable to produce cows who give birth easily and are less susceptible to illness than the average cow. In artificial insemination, cows are inseminated with a gun, much like hens, which allows for many animals to be bred from the sperm of one male. By repeating the process of artificial breeding for many generations, a more perfect animal can be produced.
Horse and dog breeders strive to create more physically and physiologically desirable animals. They want horses and dogs who perform well, move fast, and look beautiful. Longer legs and high jumping are examples of desirable show traits for these animals. Temperament is another quality considered in reproduction and is one of the traits that a good breeder can work for, although it is not directly linked to a specific gene.
Some breeders produce many small animals such as mice, rabbits, dogs, and cats. These animals can be used in scientific research. For example, some laboratories raise thousands of mice to be used in experiments. These mice are shipped all over the world so that scientists can study them.
Animals raised for fur or skin also require extensive technological assistance. Mink farms, ostrich farms, and alligator farms are animal production industries that need husbandry, feeding, and health technicians. As the popularity of one species rises or falls, others replace it, and new animal specialists are needed.
For all breeders, it is essential that they keep track of the lineage of the animals they breed. The genetic history for at least three previous generations is usually considered the minimum background required to ensure no inbreeding. For animals sold as pedigreed, these records are certified by some overseeing organizations. For animals being bred from wildlife stock, purity of the genetic line within a breed or species is required before an animal is allowed to reproduce. Stud books list the lineage of all animals bred within a facility. Pedigree papers travel with an individual animal as a record of that animal's lineage. Both tools are essential to breeders to keep track of the breeding programs in operation.
There are several ways to decide which animals should be bred, and some or all of them weigh into the decisions that the animal breeders make. The physical appearance and the health of the animal usually come first; this is called mass selection—where the animal is selected of its own merits. If the animal has successfully reproduced before, this is called progeny selection. The animal can be bred again, knowing that the animal has produced desirable offspring previously. However, if that particular animal becomes genetically over-represented in a generation, then the breeder runs the risk of inbreeding with the generations to follow. So the value of that animal's offspring has to be weighed against the need for diversity in parents. Family selection also determines the value of reproducing an animal. Some genetic diversity can come from breeding siblings of a good breeder, but it may not be enough diversity if the breeder is working with a limited stock of animals. Pedigree is the final determiner in evaluating a breeding animal.
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