What type of shoe is specifically designed to enhance a horse's leg action?

Weighted shoes are specifically designed to enhance a horse's leg action by adding extra weight to the feet. This additional weight encourages the horse to lift its legs higher during movement, which can improve the horse's performance in certain disciplines, particularly in showing or in events that require more elevated gaits. These shoes can help the horse develop muscle tone and coordination in its legs by requiring more effort in lifting them with each stride.

In contrast, steel shoes are primarily used for protection and durability, while rubber shoes offer grip and shock absorption, which may help in preventing slipping but do not enhance leg action in the same manner. Clay shoes are not a standard type of shoe used for enhancing leg mobility; rather, they refer to a different context entirely, often related to hooves in muddy conditions. Weighted shoes are uniquely aimed at increasing the athleticism of a horse's movement through their added weight, making them the correct choice for this question.