Ever notice your horse rubbing its tail and have someone tell you it must be worms? Maybe it’s not…maybe it’s a build up of smegma – that nasty slimy gunk that builds up in the sheath of colts and geldings -and also between the teats of a mare or filly! That can be very irritating and horses rub their butts ( and therefore tail head) because they are uncomfortable. A few drops of H3Oil will dissolve smegma and soothe the area and does not need to be washed off.​