the Uropygial gland hen
Health & Welfare

The Uropygial Gland Explained

Ever wondered what that small bump is at the base of your hen’s tail? That would be the Uropygial Gland! The Uropygial Gland is more commonly known as the ‘oil gland’ or the ‘preen gland’ and plays an important role in helping your hen to keep her feathers waterproof and in good condition.