Here are several different kittens getting acquainted with a baby chick. If you need any more fluffiness than this, there’s something wrong with you. Anyhow, they’d better watch out–the chick might bond to one of the kittens and then you won’t be able to pry them apart.
Why don’t the kittens try to eat the chick? Simple: because their mother hasn’t taught them to hunt, they’re too young. I’ve learned from experience that if the mother cat doesn’t teach it, the cat won’t know how to do it.