I may have a problem. I'm planning on getting a new kitten which is a female
but I already have a female cat. When I bring the kitten in the house will my other cat have any odd behaviour? If so, what would the behaviours likely be and how do you stop them?
Follow the instructions for a gradual introduction. My experience has been that, generally speaking, well-socialized female cats often accept kittens without too much fuss, especially if they've ever had kittens themselves. Initial behavior could be hissing or bopping kitty on the head with a paw. Your cat will do this to show dominance and you should just ignore it unless she is being vicious about it.