Put him down some where so you can give your cats attention too? As with a lot of animals, bunnies can also try to be the dominant animal in the house. You just have to let him know his place. Dogs are different, but this is the same situation as my friend's dog that I'm watching. Any time the cat or my dog comes over for attention, he gets jealous and pushes them out of the way. You just gotta put them aside so the others can have their attention too. Treat them all equally.
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