I want to add to this never EVER pull something out that you see sticking out of a cat's rear end (or out of their throat either) Yuu don't know what that thing is hung up on, and could do serious damage and cause great pain.If you've read the book about Dewey the Library Cat, you'll know what can happen if a cat eats too many rubber bands. Usually, a few are not a problem, depending on the size of the cat. However, check the cat's rear end after he uses the litter box; the whole rubber band may not pass out at once.