I have had my gelding, Max, almost 9 years. I make it a point to clean out his sheath every year. It's usually pretty clean, usually a small bean (about the size of a pea or so) and he sits fine through the whole thing.
Well, today was sheath cleaning day, everything was hunky dory until I got to the bean, and I almost didn't believe that that's what it was because it was so big. I actually had to press on either side of his part and squeeze it out, I was in shock! It's about the size of a walnut (I took many pictures for proof) but it got me thinking- usually with ones this big they have to come off in pieces and I have heard of the horse having lower back pain and kidney soreness after removal, what do I do next??
And how long do you go before cleaning a sheath? I think I may start doing it every six months now, poor baby. I feel like I've failed him..