The qualifications that you need to start a career in animal health depend on the position as well as the skills and knowledge that you need to perform your job duties. To become a veterinarian, you must pursue a doctorate in veterinary medicine, which involves spending four years in veterinary school after obtaining a bachelor’s degree. Veterinary technicians typically need an associate degree in veterinary technology and a license from the state in which they work. Nutritionists and animal researchers often have a bachelor’s degree or postgraduate education in biology, animal sciences, or related subjects.