An aspiring doctor must receive post-graduate education at a veterinary school, while one wishing to become a veterinary technician can work toward a certificate, associate's degree, or bachelor's degree. The degree you pursue should fall in line with the licensure requirements held by the state where you want to practice.
Whether working toward becoming a doctor or technician, you should look for a school that is accredited by the American Veterinary Medical Association. Instructors should be licensed in their field and have significant experience in the industry.
A school should also offer substantial student support services, such as counseling, as well as career placement.
Hands-on instruction and clinical practice are both very important to a veterinary education. Find out how much of the program is dedicated solely to classroom instruction and how much is devoted to time with animal patients.
And if you're interested in a particular specialization (such as veterinary oncology or cardiology), you should look into those programs and consider how in-depth they are, and much time specialization will add to the overall length of the program.