Should've been called Mammaltropolis or something...
I know I'm nitpicking a bit here, but ZOOtopia would naturally lead one to think that this was your typical world of anthropomorphic ANIMALS (not just mammals; since ZOOlogy is the study of the entire animal kingdom, whereas the mere study of MAMMALS specifically is called - surprise, surprise - MAMMALology!) not to mention with the whole TOPIA suffix being changed to TROPOLIS in Europe, due to the North American title already being given to an actual ZOO in Denmark specifically, you'd think Mammaltropolis (or even Mammaltopia for that matter) would've been a more appropriate for a more universal and plot-indicative title.
Phew! Sorry for my brief lament but this was one aspect of this film that was REALLY bugging me recently...