Veterinarians examine and treat animals to diagnose health problems, vaccinate against diseases, and ensure a safe food supply. They typically work in private clinics but some travel to farms or work in laboratories. Veterinarians must earn a Doctor of Veterinary Medicine degree from an accredited college, which requires 4 years of study following an undergraduate degree in biology or animal sciences. The average salary for veterinarians is $69,100 in Iowa and $82,000 nationally.