Talk:Zootopia/@comment-24765412-20151212113546/@comment-26664919-20151213200319

I remember Byron Howard and Rich Moore talking about this. They chose mammals only because of the predator/prey diversity between them. When they included birds, reptiles, and so on, they realized one creature tends to more likely prey on some other creature. But when it comes to mammals, you can have rhinos or elephants or hippos, basically a large selection of species that don't prey on any other animal. They liked the idea of keeping predators as a minority in Zootopia.