I am trying to introduce my 7 month old kitty to a 12 week old kitty. And, my cats are still fighting. I don't have a place where they can sniff eachother. I think its getting better. I put the older, leash trained kitty on a leash and let the younger one walk around her. The older one hisses and growls, but at least she's not hitting or anything. Right now they're in the same room, but its peachful because they're sleeping (thank goodness for catnaps) Please, what is normal behavior, what should I look out for when introducing these two cats?