Not all the co-op game about hunting massive monsters, they have some grislier uses, too.
Rockfoil rabbits are adorably round, and they'll perk their broad ears up while they're travelling, or when they're on alert for danger. With a bit of patience, you can catch them and keep them as pets. Isn't that nice?

No, it isn't nice. Wild Hearts takes after the Monster Hunter series in more ways than one, including the need to gather crafting components to create better gear. The Rockfoil Rabbits fit into this scheme, and you'll need to use parts of these harmless, fuzzy bunnies for crafting.
What exactly they're used for, we don't know yet – perhaps they're part of a nourishing stew, or maybe their pelts can be used to make warmer armour. We hasten to point out that Rockfoil Rabbits aren't real, and that you aren't actually a bad person for doing this. We hope, anyway.
Check out the best games like Monster Hunter to tide you over.