Thank you very much!You're right that successful interbreeding is pretty much impossible in reality, but there's nothing wrong with delving into it in fiction. Many WildeHopps shippers like myself toy with the idea of Judy and Nick having kids, despite the ship not being an official one (yet). Some decide giving them kids of their two species each (like 'LittlePolka' with her fan-comic "Road to Happiness", which partly inspired my WildeHopps family AU), but others like me and my friends 'HahStudios' and 'crewefox' prefer to give them mixed-species offspring. Speaking of which, I have the idea that being a mixed-species mammal in Zootopia is the equivalent of being a person of mixed race (aka, mulatto), which is a topic that I consider tackling with my family AU story in the near future.