Not that I’m aware of, he has been out in the arena for a roll without a rug although not something he’s not done beforeOurs had this the other week and decided she was too warm in her rug with a liner…took the liner off and it cleared up in a couple of days.
Could also be rash from mud/sand…has he been laying in anything different to normal?
Could it be a reaction from the sand/surface?Not that I’m aware of, he has been out in the arena for a roll without a rug although not something he’s not done before
Yes I read the same but our previous pony also had the same thing after a warm spell when he was wearing a heavy rug so I think it’s perhaps not that rare as 2 of ours have had it!My mare was covered on her sides and a few on hindquarters last Saturday, it was very warm on the Friday so
I assumed she got too hot under rugs but when I googled it apparently it's unusual for horse to have a heat rash, more likely allergy to something. Anyhow she was fine in herself, I reduced rugs and hives have now gone but taken all week so it's a bit of a mystery why they appeared.