Originally Posted by Iseul
Her hair has been coming out in "plugs" all winter, and I believe when she shed out last year it did the same thing.
I've only had a metal "shedding blade" to groom her with because her and another horse aren't allowed to have the set of brushes on them in the winter because they're prone to rain rot.
I know another horse, Sox use to shed like this every year if we didn't have a consistent temp (which we definitely haven't had this year, 60 to 12 in one day lol), never had rain rot though as it always went away by the time his summer coat grew in.
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Rainrot will disappear under dry conditions (from personal experience), which may explain why it subsided during the summer. That (picture) is not shedding, it is some sort of condition. It isn't that expensive to have a scraping taken and analyzed. If it were me, I would treat it as a fungus/microbe, whatnot, in the mean time until I knew what it was. Savs are generally not good b/c they give the little icks a "medium" to live in, not to mention lock in moisture. Antimicrobial washes are usually best, and keeping brushes cleaned and separate.