My family took in a 6 year old neutered male cat named Chips 6 months ago. He isn't a very sweet cat, rather selfish, and he is pretty aggressive if you cross him the wrong way. I recently took in a second cat, a kitten named Goofy who is 8 months old and not spayed yet. When they first met, and Chips saw me bringing her in the carrier, he began hissing and spitting and puffing up at her. She is small, and I am afraid if he gets at her he might seriously hurt her. Would there be a big fight if he was able to get at her, he has shown aggressive behavior before, as we suspect he used to be a mouser at his old house. I feel bad keeping Goofy locked up in my small bedroom all the time, but I dont know if it is safe to let the two mix... please help!