They don't have to spend all day looking for food or for a mate, so they need something to do. We may give the rhinos logs to push around. At closing time the animals go back into the barn, each into their own personal stall. We have staggered days off on the weekends and holidays. You can get into the field with a degree in biological science, zoology, psychology or ecology.
Experience is the main thing.
A lot of people start out working for vets to get experience with animals. I did a lot of work for vets starting in high school. I started out as a volunteer and then was a paid employee, making farm calls. In Lansing, Mich., I worked as a K-9 unit trainer. I was a decoy.