Zoos introduce the Public to all sorts of critters. The Public sees that We have feelings and needs. All in all, a Tidy Experience.
Life in the Wild is different. The element of hazard is more dynamic and the resident is challenged to respond to Nature. Immediately. Naturally.
We Rhinos notice that there is little Wild left to inhabit. Although the scale of things varies, We Rhinos are always in the Zoo. Fact.