I just got a new kitten about a week ago, at first it was hell because my current cat jess didnt like the new kitten at all, but after a few days of been seperated jess started to open the bedroom door to let the kitten out because it was always crying and didnt like to be left alone. now the kitten and jess are always playing but sometimes jess hisses and growls at the kitten. its been over a week now and jess doesnt seem to be the same anymore she seems to be scared of the kitten from time to time, she wont eat her food when the kitten is eating his food and when he is eating she sometimes goes up to him and she smells his tail but hisses and growls at the same time. she is always on her guard all the time, and i dont know what to do to reasure she and to tell her that this behavior cant go on. sometimes jess wont let me handle her she sometimes attacks, im very concerned for her please could someone help me and advised me on what i should do.