I'm just wondering if anyone has any suggestions on how to successfully introduce a new resucued kitten, to my Yorkie, Chewie. They are about the same age, 5-6 months. I would love for them to be friends, but at the very least to tolerate each other. Chewie has been barking at new kitten and rushing her; is this excitement or annoyance? Kitten also hisses and growls back. Should I be interfering in their interactions, or just let them be? Any tips are greatly appreciated!