My friend recently got an 8 month old cat and she is a little stuck in the introductions. He has been around for three weeks and she is at the step where she can take away the baby gate as long as there are plentiful treats and her resident cat is fine. It has been this way for awhile now and as soon as she stops the treats resident cat gets very angry and goes for the kitten. Where should she go from here? I couldn't find anything on Little Big Cat about it.