My gelding tends to get a buildup of dark, sticky grossness on the inside of both hind legs, above the hocks and below the patella (gaskin area I think). It’s stickier than dried sweat, and hard to remove. I’ve tried damp cloths and rubber grooming mits gently. What is this stuff, and what’s the best way to remove it in wintertime, since I don’t want to soak his legs?
I’ve had geldings before but never noticed something like this. He doesn’t go around with his “equipment” out, so I’m not sure what’s causing it. He also doesn’t sweat hard enough to get really lathered back there. Maybe it’s sweat + urine ?? (Vet confirmed it isn’t rainrot.)