As you all know, I brought Salem's sister home today. Well, it's not the happy reunion I expected!!! i am just going nuts. I need some help and advice. I haven't had two kitties at the same time before so I do not know what is normal or not normal. I thought they would be fine together since they are littermates and had been together. Spook (the female) is hissing and growling at him and Salem is chasing her around and then they are fighting and I am freaking out!!! I don't know what to do! Do I ignore this or yell to scare them apart or what??? I thought this would be a joyous day but I am all upset inside. Maybe for no reason but I have no idea if this is normal or not. PLEASE HELP!!!