Aggressive cat - have read stickies, still need help.

I have four cats - one male, three females. Our youngest cat, about three years old, at about two began suddenly attacking one of our other female cats relentlessly every time she was able to corner her. We have tried seperating them, resocializing them, giving the aggressive cat various medications such as prozac and st. john's wort, and trying out a spray that has some form of synthetic hormone in it.

None of these have worked. Recently, the aggressor put her favorite victim in the vet's for severe bite and claw wounds. The victim in question is a shy, reclusive cat, and has been even more shy of coming out of hiding since these attacks began over a year ago. We have tried everything, including the ones that supposedly take months to work.

We're at our wit's end. Would we be best off finding our aggressive female a new home?

Also - all four cats are spayed/neutered, and the aggressor doesn't bother the other two cats.

Have you taken her for a complete vet check to rule out any physical ailments??

Originally Posted by rubra

Also - all four cats are spayed/neutered, and the aggressor doesn't bother the other two cats.

Click to expand...

Have you taken the pariah cat in to be thoroughly checked out by a vet?
It could be the your shy cat is actually ill and the aggressor is acting on that.

I've had both cats checked out by the vet. Both are healthy - aside from the clawmarks and wounds anyway - and up to date on their shots. The vet reccomended we find our aggressive one a new home.

I don't believe the victim is starting it, no. As our aggressive female will go out of her way to find and attack the other one, even if it means digging her out of her own crate to do it. The other just runs. She'll only fight back if she can't escape, such as when she's jumped in her crate or when she's cornered. Otherwise she runs. I've been watching them for a while now. I love my kitties, but I can't keep putting them through this.

At this point, it really does sound as though you've really exhausted all your options.
It might be time to consider finding a new family for the aggressive cat, one where she will be the only cat.
I don't make the suggestion lightly.

Some cats just do not do well in multicat situations.
Better that she be happy and your shy cat not be harassed to the point of becoming sick.