Here is my solution to integrating Maxine into our mix of cats........Sammi is really hissing badly at her, so I thought I need to start getting her smell up in the house and out of the basement......so I have had this pet playpen for years and moved it into the living room and zip her in it several times a day for a total of a few hours........Skip, Jif, Cassi and Sammi hiss at her, but I have armed myself with the can of air and just the sound makes them run........hoping eventually they will stop this.......I am only fearing for Maxine as most the others were feral and street smart......I wouldn't want her getting hurt, so until I feel comfortable, this is her new upstairs digs......she still has the full run of the kitty room in the basement when she is not in here.......