Bunny Plans

Does anyone have any suggestions for how we can best convince the human that a bunny would be the perfect replacement for Brother?  Really, rabbits are entirely superior.  They can use a box just like a cat, but bunnies are so much less messy about it, and since we eat salads, we're so much easier to feed!  A bunny would be the perfect friend, we are sure, but for some reason the human keeps mentioning hunting that cat down.  How can we get her mind of felines and onto nice rabbits?