New kitty....and angry cat resident.

[NoahsMommy]

I agree that it is a female thing. We just got a new kitten last weekend and our girl kitty still wont go too close to him without hissing. It's a girl thing.

Can you separate them??

I've heard of people rubbing catnip on both cats, that way, they wont smell "another cat" smell and wont be too upset. Maybe you could try that?

You do need to give your girl kitty lots and lots of attention, that way she wont feel too much competition with the new cat.

Hope this helps a bit.