That's not what I'm wondering about, though. With my horse, I can run my hand along her back while there's water on it so I can rinse her off. She's pretty good about just standing there and not moving. But with Duncan, he'll hunker his back down and act like me running my hand over his back, or rear end, hurts. I've seen other younger ponies (any a donkey) do this at my mom's house, but we never pursued why. Any one have any ideas as to why he'd act so tender when he's being washed? I've ran my hands all over his back when he's dry and nothing happens, even when pressure is applied.