My 2 year old female, Dave, has an attitude problem when it comes to my other 4 cats. She is mother to 3 of them (now 1 year old) and the sister of the other. They have never lived apart.
I've had this problem for about 8 or 9 months and have tried various things to try to manage it. I've tried working with their scents, Feliway, separating them as needs be. She growls at them if they're within 3 metres of her and will take a swipe on occasion. I've heard thing get more aggressive with her brother today, but didn't see anything and it was over by the time I got there. She tends to avoid them if possible.
I allow her to sleep separately at night and she's the only one allowed upstairs during the day.
Some of you may remember that she had a road traffic accident at Christmas which resulted in he having a plate fitted to her pelvis and her having two weeks away from us at a surgeon's a couple of hours away. She's been given the all clear for some time, healed quickly and well and this problem predates her surgery so I don't think the two are related. Actually, I had a couple of quiet weeks with no aggression after she returned home.
What else could I try? I'll do anything at this point.