Teeny tiny bumps on horse's back
Yesterday I noticed that my gelding has teeny tiny bumps pretty much all over his back to about halfway down his ribs. They caused him no discomfort, couldn't see any itchiness, and when I rinsed him off, it looked like tiny little scabs were coming off. I know it's been raining a LOT in the evenings and that's when they're turned out, and the flies, gnats, and other "non-friendlies" have been ridiculously awful this year because of all that rain. The BO's daughter said a couple of the mares has the same thing a week or two ago. The mares and geldings are separated, so he wouldn't have come into contact with them.
Any thoughts on what it is? I'm going to do a medicated shampoo bath next time I'm out just in case. If they're still there, I'll try to get a picture, but you almost can't see them and you can barely feel them - feels like goosebumps on people skin without actually being goosebumps. I let the BO know so she can tell the girls to keep an eye out for anything strange. Honestly, they don't pay attention at all to the horses when they come in OR go out, so I doubt they'd notice anything anyway.
The wind of heaven is that which blows between a horse's ears. ~Arabian Proverb