I agree with gating idea. That way they can see and smell each other. Also it will give them time to adjust to the others presence. I also had a cat (gone now) who wasn't very fond of her brother dogs. But she certainly took care of herself. She just wasn't into all this bounding nonsense and calmly and politely (almost rolling her eyes) waited for the dogs to leave her alone. If their attempts to play with her went on too long... she would give them a hiss and jab of her paw. And they knew, party time was over.