You can't have a thriving Animal Control without a large number of furries. For the most part, you have to be in the fandom to discover and farm it's cows.
The thing you need to understand about furries are that they're a diverse group with different levels of depravity. There are the furry kiwis of AC and then there are the furry cows featured in AC threads. It's really no different than the non-furry kiwis and cows, except that they have furry fandom in common.
@Null likes furries because they drive traffic to his site and give the non-furry kiwis something to bitch about.