Now that I've stopped laughing at the mental image your question produced, here is my answer. I'd choose the horses. Although horse bites are nasty, the little mouths wouldn't be able to get much of a grip. If they tried to kick me I could stand on them, or on a chair, as horses can't climb. Mr. Mouse, on the other hand, can climb, scratch, and bite with a vengeance. Unless I had a giant cheese handy, I'd be in trouble.( Not to use as a weapon, to distract him while I ran away.) Anyway, I'll stop mulling it over or I'll have nightmares tonight!