A vet tech is someone who is trained in the care of animals under the supervision of a licensed veterinarian. They take samples to run the test on to assist in diagnosing illnesses. Some of those samples include blood, urine, tissue and fecal. Other duties given to a vet tech are assisting in dental care, developing x-rays, sterilizing surgical and other lab equipment and providing post operational care. Vet techs also record animal case histories, provide specialized nursing care and even vaccinate