When something reminds you of a rabbit, you can describe it as leporine. Your cocker spaniel puppy looks especially leporine when she lies on her back with her long ears stretched out on the floor behind her.
The adjective leporine is used for anything having to do with rabbits or hares. "Let me introduce you to my leporine pets," you might say before showing a new friend your three pet bunnies. It's also a good descriptor for animals that resemble rabbits, like pikas, viscachas, or Patagonian maras, all of which are small leporine rodents with ears that stand straight up. Leporine is a Latin loanword, from the root lepus, or "hare."