Can you retire from veterinary medicine?

The practice of doctoring and diagnosing animals.

Yes, the field of medicine includes veterinary medicine. (hence veterinary "medicine")

Pre-veterinary medicine is what you do before veterinary school (that's what the pre is for). Veterinary medicine is not a major. It isn't done at the undergraduate level but rather the graduate...

A Bvm says that you can do veterinary medicine such as diagnostic work, however you cannot perform surgery until you complete the Bvs or Bvms

A small white pill with the marking AN 627 is Tramadol. Tramadol is a pain reliever used in both humans and animals.