This isn't exactly rehab necessarily, but I couldn't think of another way to say it. So, my horse got the SI injection on Wednesday and on stall rest the rest of the day. Thursday he was allowed to get turnout. Friday I could start working with him at the walk. Well, Saturday a massive rainstorm popped up where the barn is (before I could get out there) and massively flooded the barn, indoor arena, and the state highway (by a couple of feet, shutting down the road for a while) out front. There's a lot of fencing damage, the aisles are still standing water, the pastures are wet, soggy, and very muddy, and the indoor is out of commission for a while. So, now I'm in a pinch for working with the horse to determine if the injection worked. Horses were turned out during the day today (typically only night turnout during the summer because there's no shade or shelter) so they could work on the barn. I don't want to risk injury if I try working in one of the smaller paddocks, the indoor is out of the question. There's an outdoor, but it's incredibly hard (like sand cement). Would that be bad for the possible SI issue? What can I do with him in the meantime?