I have 3 cats. All neutered.
First is a female aged 6 - she was a rescue who my DM adopted and I inherited 4 years ago when DM died. She can be very sweet but is a biter (to humans, without warning) so we have to be wary. She's goes outdoors.
Next we have 2 Burmese. A very large and docile boy, and a very small needy girl. They're indoor cats. We've had them for almost 3 years from kittens. We got the Burms because the rescue cat isn't the best pet for our children but we all do love her and I promised my DM she'd always have a home with us and she will. The Burms are the children's cats.
The trouble is that our Burmese girl (BG) is bullying the rescue cat (RC) horribly. RC isn't a fighter at all. She's never been fond of the 2 Burms but they rub along and will often all sleep in same area such as on our bed. The Burms try to play with RC but RC isn't interested.
After almost 3 years BG has discovered if she chases RC, RC will run. We intervene. This chasing has developed to BG attacking RC recently but we were unsure how malicious it was. We discovered RC had an injury a week ago and she's been to vet and had abscess drained and just finished antibiotics. When she was shaved vet found another old bite wound too. We thought both happened outside as there's a local bully cat but had a suspicion it could be BG.
We've kept RC and BG apart for last week except under supervision. All seemed fine but while I popped downstairs today I heard some charging around and rushed upstairs to find RC cowering in a corner scared witless with BG ready to attack again and clumps of fur around.
I'm now thinking BG is responsible for RC's injuries.
This is new behaviour.
I'm at a loss what to do. Clearly I can't leave BG and RC together at all without supervision but that's hard long term. Has anyone had similar and how did you fix it? We kept them apart for a week except under supervision but the second I wasn't there BG has attacked and cornered.
Any ideas please? Feeling upset for RC. BG only seems to do it if we're not in the room.
Any ideas welcome.