I just got a kitten 1 week ago. He is about 10 weeks old. We already have a 1 year old male cat. I kept the cats away from eachother the first day and then slowly let them smell eachother. The big cat has never been really "mean", but he does growl at the kitten every once in awhile. He usually growls at him if the kitten tries to eat out of his food bowl at the same time, or the kitten tries to play with a toy that he's playing with. He also licks the kitten a lot and they both run around chasing each other. I haven't seen him swat at the kitten or be very aggressive, but the growling worries me. Is he just getting used to the kitten? Is this all normal?