How to Clean the Sheath of a Horse. The sheath is a tube of skin that protects the horse's penis. Smegma or a lubricating secretion fills the inside of the horse's sheath. In the wild, a horse would work out this lubrication naturally.
This is very helpful as my white legged paint has this. Scratches in Horses: Discover the possible causes of scratches and how you can prevent and treat this frustrating dermatitis often found on a horse's pastern in our step-by-step visual guide.