Treatment for under-run heels typically involves a combination of corrective trimming and hoof care, along with addressing any underlying causes. Corrective trimming will involve reshaping the hoof capsule to provide more support to the heels. This can be done by trimming the walls of the hoof to a shorter length and increasing the angle at which they meet the sole of the hoof.
In some cases, special shoes or inserts may be used to provide additional support to the heels and help them bear weight properly. Regular hoof care, including regular trimming and maintenance of shoeing, is essential to manage under-run heels and prevent further progression.
Adjustments to the horse's environment and management can also be helpful in managing under-run heels. Providing soft footing, such as deep litter or sand, can help reduce stress on the heels. Avoiding prolonged standing on hard surfaces, and ensuring that the horse has adequate exercise, can also contribute to the overall health of the hooves.
It is important to work with a veterinarian and farrier to develop the most appropriate treatment and management plan for your horse's specific needs.