Vet looked at Riv yesterday. Yeah, it's swollen. Yeah, he's a bit off. But there's nothing apparently wrong with him... maybe he just whacked his leg on something? So I'm wrapping him when he's stalled for a few days to see if that takes care of the swelling. If it does, then the wraps stay off to see if the swelling comes back. If the swelling comes back, then I call my vet and cry and curse River for being a jerk.