I've looked into marbles a bit more, and I'd rather have something permanent. In your case sounds like the marbles are the way to go- I wouldn't want to spay mares like yours either

I'll never breed Satin again, so in her case, it seems like the way to go

Katie, our Paint mare never shows any noticeable signs of being in heat. No mood swings, no nasty behavior, and she doesn't squat for anything like Satin does

I've been around alot of Paints like her, and I just luff 'em! My Dad's mare is the same way

Karen