So I went to the barn today and on the back of my horses "elbow" Is a soft squishy ball about the size of two golfballs, I asked my barn manager what is was since I had never seen something like it before and she told me right away it was a shoe boil. I have been looking online and there is some people saying it needs to be drained and some say to never drain them and let it take care of itself. I put one of the shoe boil donut rings on him but I was wondering if there was anything I can do to hurry up the healing process or anything at all? I also read DSMO was a possibility but figured I would ask if anyone had first hand experience with this situation! Thank you for any and all advice!!! My horse lives in a 18 x 18 foaling stall bedded deeply with shavings that are changed daily. So bedding is not an issue. What we think happened is we were at a clinic all weekend and worked hard and then had a 15hr haul coming back home and he was probably exhausted and laid down longer than he normally would causing the shoe boil. Thanks again for all the information!