My boyfriend and I have been introducing a new kitten to our seven year old cat for the last week and a half. We keep the little guy in a kennel at night in his own room where the older cat can't get into, and the kitten is not allowed in our bedroom as that is Thora's domain. At first, she would smell around the outside of the door and then go about her business. I figured this was good, since none of her behaviors had changed and she still seemed comfortable knowing another cat was around. Things turned bad when we started bringing him out for short supervised visits. Thora seems interested in him, and cautiously approaches him, but when he gets too close, she will hiss at him and then run away, and things aren't improving. Now, she will follow him around, corner him, and bat at him. We are worried to leave them alone, and I can't think of anything to make this easier except time. If you have any suggestions on how to avoid these aggressive confrontations, please help!