Except it's not really rivalry. It's more like an over exuberant mugging than rivalry.
I need some expert and/or knowledgeable cat advice.
First, the players:
Mai-lyn; siamese female; spayed; 16 ¾ years old; she's been with me for 12 years. She weighs about 8, maybe 9 pounds. Mostly toothless, but her claws are sharp. She's a loud, obnoxious, pushy girl who will play with toy mice, but denies it when caught at it.
Pandora; female; spayed; 11 ¾ years old; she's been with Rob since she was a kitten. She weighs about 9 pounds. She's mellow, shy, laid back. Spends a lot of her time lurking in corners, if not outright hiding.
Max; male; neutered; 2 ½ years old; we got him as a kitten. He weighs about 12 pounds. He's cuddly and playful, somewhat destructive, and adores the dog. He also drinks water with his paw, and enjoys being petted with a foot, which is just weird.
Jake; dog; male; neutered; about 5 ½ years old, we got him about 4 years ago. Smart as hell, likes the cats, loves Max and doesn't understand why the other cats snub him.
Mai-lyn and Pandora have been together since Rob & I moved in together – about 6 years. They are not fast friends, but they tolerate each other relatively well. There's the occasional spat, but it's usually just growling and hissing, no actual fighting. Mostly they ignore each other. They also both tolerate the dog. Not to actually allow near them, of course, but they allow him floor space.
The problem is that Max is tormenting the hell out of the girls. He attacks them constantly – I think it's just roughhousing, playing, but I'm really not sure. We find minor scabs on all three, head and neck, but there's never been any real bloodshed – just the occasional tuft of fur floating around. Lately, it seems that Pan and Mai-lyn have been getting jumped more and more often, and more roughly as well. I've heard body slams and thumps from upstairs, and Mai-lyn or Pan yowling and snarling. I've seen it as well, and near as I can tell Max is the instigator, and the girls are Greatly Displeased about the whole thing. It's getting so that Pandora doesn't come out much from behind the entertainment center, and Mai-lyn has been walking more stiffly than usual – I'm afraid that they could get hurt, if they aren't already. Besides that, Pan has diabetes, which currently is under control with special food, but this kind of stress can't be helping much.
Yelling at Max does zero good. He'll just take off, then when we're not looking he's back at it. He never holds a grudge, either – just pretty much ignores us.
I really, really, really don't want to get rid of Max. Just thinking about having to do that is making me cry. But both of our girls are seniors and deserve some peace. Today, I got fed up with it and locked Max in the library. All day. It's not that bad, that's where one litter box is, there's a water dish in there, a sofa and a window sill. He was fine. The part that breaks my heart is how relaxed the other cats were – Pan came up for petting, and both settled in on the couch with me.
I've thought about getting another kitten, maybe a 1 year old. Best case, Max and the kitten wear each other out. Worst case, they both gang up on the seniors – I can't take that risk.
I'm at a loss. Any suggestions (that don't include a cat fricassee recipe) are more than welcome.