This is a new one on me, but brought it up on thread a second ago, and thought I would lay this out for others to comment on, and am hoping that someone has also seen this, and felt it caused a problem. I just read Mark Rashid's book Whole Heart, Whole Horse. In there he mentions a gelding that was a danger to ride, he would be going along just great, and then WHAM, crazier than a run over dog. Bolting, bucking, you name it. Apparently many things were thought of, with no real success. But when his sheath was cleaned, and can't remember if this just came up in normal care, or someone suggested it as a cause for this behavior? They found 2 or 3 very large beans, I believe Mark wrote about 1/2 size of his little finger, as well as lesser amounts of matter to clean out. Mark wrote that the horse never exhibited any more of his wild ways after that, and went back to be the calm easy horse that he had been in beginning. I am hoping someone on here has also run across this? It would make sense to me for something to be so irritating, especially when girth was tightened and making the stomach/sheath area tighter, that this would cause pain.