I've seen this before--it's so cute. Too bad my dog would LOVE to kill my rats (as in, sits outside the cage staring at them and making guttural whines/screams) and the cats would love to kill the rats and the dog greatly enjoys chasing the cats. If I hear the cats getting into something, I just yell CAT! and the dog goes careening down the hallway barking madly to make the cats disperse. This sort of harmony would never fly in my house!