Before I get anyone saying that he needs to be cleaned, I'll give you some history. During the winter, our horses are kept an a paddock area and kept off the pasture area. After winter started, sometime in November 2010, we noticed that Harley's sheath was swollen. We tried cleaning it and the swelling remained. We called the vet and had a full checkup done on him. The vet also cleaned his sheath but said it was really clean. The vet couldn't find anything wrong with him. The only thing they could come up with was that he swelled up from not being able to move around like in summer.
I've talked to other owners and have found out that their horses have the same thing going on. One side of the sheath is swollen, and kind of firm or hard. The swelling goes from the sheath forward along the belly, some farther than others.
Has anyone else experienced this or heard of it? It just kind of sounded like the vet was grabbing at straws when he told us that, but when we heard others having the same problem, we felt a little better. He's still swollen today.