What is one main function of the heel bulbs in a horse's hoof?

The primary function of the heel bulbs in a horse's hoof is to absorb shock. The heel bulbs are located at the back of the hoof and play a crucial role in providing cushioning as the horse moves. Since horses are large animals that experience significant impact during activities such as walking, trotting, and galloping, the heel bulbs act as shock absorbers to protect the internal structures of the hoof and the horse’s legs from damage. This shock-absorbing feature helps reduce stress on the joints and tendons, contributing to overall soundness and performance.

While the hoof wall does provide structural support, and moisture regulation is important for overall hoof health, the specific role of the heel bulbs is directly tied to their ability to absorb shock. Nutritional support is provided primarily through the horse's diet and other hoof structures, but the heel bulbs are not designed for that purpose. Their shock-absorbing capability is essential for maintaining the comfort and efficiency of the horse's movement.