I am at the end of my tether as I have never had this problem before. I have a 5 year old resident male Sphynx (Caluga) and on 1 March my other 5 year old male Sphynx (Molly) died of HCM. Caluga seemed lonely, so after about a month I adopted an adult female 6 year old Sphynx (Soso). They are both spayed and neutered. When I first bought Soso home it went OK-ish - after the first couple of days they more or less tolerated one another. Now, around 2 1/2 months down the line things have become unbearable. They hate one another and because they are both indoor cats it is really difficult to live with.. Caluga seems to be really bullying Soso.. he will chase her and when she has found a place to hide he will 'posture' next to her.. tail up and quivering, making himself taller and looking menacing. She reacts by making this funny, low growly noise and it often ends in a horrible fight. When Caluga and Molly lived together they would often 'play' fight and it never escalated, but this is really horrible to live with. I really don't know what to do. Soso has by far the sweetest nature of the two. Should I consider re-homing Soso as she was last in - I don't know if I could live with a situation like this forever, especially seeing as how we live in a very small place and are around each other all the time. Any suggestions.. I am not enjoying they way things are at the moment.