As with the others, I, too, have bonded my cats with my bunnies (not like they bathe each other and lay together, but they don't attack each other), but all of my animals are strictly indoors. Not to mention, the key thing with bonding them was giving my kitties Soft Paws (
http://www.softpaws.com )so they couldn't scratch the buns when they were playing together. Since you can't do that (and I wouldn't recommend it with an outdoor kitty), I'm not sure what advice to give you, other than to put a metal mesh on the outside portion of the buns' cage/hutch that has openings small enough that the kitty cannot get his paws in the cage.
Here's what we put on our bunnies' cages...the technical name for it is hardware cloth.
It's not too expensive, and you can just attach it to the cage with zip ties (cable ties). You have to fold over and sinch the edges, as when you cut it they are rather sharp, but it's WONDERFUL!! It's just the right size so the kitties cannot stick their paws in the bunnies' cages, so there's no risk of either injury to the bunny, or injury to the kitty from bunny teeth.
Here's the thread I posted about it, if you want to read more (though I think it might say the same stuff I said here...lol):
http://rabbitsonline.net/view_topic.php?id=13483&forum_id=1
Anyway, let us know how things go!
