Whenever my mom found old medical or anatomy books at yard sales and just put the on the shelf. She said, you never know. I have used some a little to reset a broken pinky, the hosp had set it a little off and when I stretched rebroke. I got a much better job, but I doubt I could do surgery unless I knew without a doubt that I could do any good. Some of the first c-sections on humans were done by vets that had to do it more often.