I have some ideas for a warrior cat mod. It would be like you can find randomly spawned clans of cats in a camp in the minecraft world. They would be hostile ag first but you can turn them neutral by maybe giving them prey. There could be new prey mobs in the world depending how this goes which they hunt. There also could be some new blocks and interfaces like nests and a prey pile.
To make an incentive for making a clan neutral prey mobs (or chickens etc) will drop special meat or drops when killed by a cat. The more you give the clan prey they could become tamer and give you the special drops.
the drops could be brewed into potions or be food with buffs to reward you for taking care of the clan