I found this beauty on YouTube xD
I personally subscribe to the theory that the Zootopiaverse has only mammals as the "evolved" ones, while reptiles, birds, amphibians, fish, and invertebrates are all still normal, non-sapient animals. So in theory, Judy could own a pet turtle or a pet bird, without the awkward implications or confusion. I have, however, entertained the idea of those other animals (namely birds, reptiles and amphibians) being aliens as well. Instead of little grey men, its birds or something.