A gait abnormality where the toe of a hindlimb contacts the palmar aspect of a forelimb. This may result in a tread injury, frequently to the bulbs of the heels, or to the loss of a horseshoe (caused by the toe of the hindlimb stepping on the heel of the shoe), which is pulled off as the horse lifts off with the forelimb. This form of interference can happen at the trot, canter or gallop. At the gallop, the overreach injury may be as far proximal as the tendon region.