Mules have backs of different shapes with different withers just as horses do but are generally more flat-backed. Most mules require a semi-quarter horse angle with more space in the gullet for their meatier backs, and the following saddles provide that extra space. Mules have fat pockets that run from the top of the neck, acroos the ribs, to the tail dock, and a horse saddle with too much rock will often sit on these and cause sores. Their kidney are closer to the center of their bodies than horses' are, so a saddle tree sitting flat on that area and causing too much pressure may cause white hairs and discomforts. Choose a regular or wide tree depending on the weight and shape of the mule.
