Most people don't realize that rabbits are intelligent animals. Not dolphin or chimpanzee intelligent, but rabbits are intelligent in their own way.

For example, wild rabbits have intricate social structures in their warrens and when kept as pets rabbits can be trained to use a litter box just like a cat.

So just because they're cute and little doesn't mean they aren't intelligent. It's just we as humans have put certain labels on certain animals because they don't quite meet our idea of what intelligence is.