Update: swelling back: Random poofy legs: not lame.

We are buggy, but I don’t think that is it. He has a horse fly “boob” on his belly, but we don’t have the little bity gnats, and he isn’t typically bothered by mosquitos. The scabbing just appeared to be kind of stretch marks?

We have had cold weather steady now (highs in the 60’s), and his legs have had no fill for 2 days, so maybe it is a combination of old(er) age and the sudden heat? Supposed to get hot next week (high 80’s), so curious to see what happens.

Is he outside?

This is exactly how a few horses at my trainer’s barn reacted after they ate something that gave them a ripping case of photosensitivity. Mine was affected and all the skin peeled off his shoulders–the horses with leg swelling lost skin on their legs. If he’s been eating alsike that’s a known culprit. Fortunately in my case even though the cause was never found everyone recovered.

I’d get the vet to run bloodwork to check liver function and I’d keep him inside out of the sun until you know what’s going on.