2 years of schooling if you already have a bachelors. And for the love of everything, don't go to western career college. It is crap unless you have a work ethic from GOD. If you are anywhere near the San Fran bay area, join the Foothill program. Is good. 99% pass rate for those who make it to the end of the program.
You need to also take anatomy and physiology, microbiology, basic chemistry, and a basic math class.
My first year classes included medical terminology, learning the basic info of each species plus behaviour plus reproduction plus nutrition plus equipment plus ethics, restraint, injection locations, IV catheter placement, blood draw locations, basic animal care, bandaging, wound care, client relations, lab animal medicine, dentistry, etc.
Second year includes pharmacology, clinical pathology, medical math, anesthesia, radiology and emergency medicine.
Plus, 15 hr/wk internships starting the third quarter, weekly animal care shifts for the animals housed at the school and that includes breaks and summer for the large animals. Internship in the last quarter goes to 20 hr/wk.