My new cat is attacking my old cat. How can I introduce them?
For years I had a older female cat and a slightly younger male cat (7 years old). A few months ago my older female cat passed away, and a little while later I brought home a 2 year old female. Although my older male has shown interest, my new cat wants nothing to do with him, and will actively seek him out and torment him. Help! I don’t know how to introduce them.