Hello everyone. I'm new here and thought I could get you opinion on this matter. We just lost our 2 year old boy Scooter a couple weeks ago to a car. He left behind his buddy my 1 1/2 year old Missy. She went around the house looking for him for a couple weeks so we decided to get a new buddy for her. We adopted 6 month old Max from a local shelter. He is extremely lovable and friendly and has been around many other cats. Missy of course is hissing and the usual becaus he's new to the house. He is safe in our spare bedroom with lots of toys, his own box, and bed. We will be introducing them slowly and they do sniff eachother through the door. Any advice on how else to go about new introductions? Is getting a pheramone diffuser a helpful thing? I have thought about it just to diffuse any tension till they get to knw eachother. I appreciate it! Thanks!