this is too cute!

my friends parents had a pet pig once, not sure what breed, but they couldn't litter train him, so he had to wear diapers. Eventually they gave him up for adoption, something about not getting along with the dog or cat.

I understand that pigs are about as easy to litter train as cats are. I've heard they like to make nests which can be about as destructive to a house as a cat using your couch as a scratching post.

Rabbits will litter train themselves, kind of like cats. Some just never really get it (like some cats) but for most, you just give em their box and they'll use it.

After a trip, my two bun-kids will RUN for their litterbox, hop in and do the "ahhhhhh" face. I've never trained them not to go elsewhere, but they definitely hold it until they see that box!!