A therapy horse is a horse that has been selected, conditioned, and trained to be included in the delivery of hippotherapy and characteristics include, but are not limited to: excellent quality of movement that is symmetrical, rhythmic, supple, straight, adjustable, and with self-carriage. It is important that the horse’s gait be symmetrical to allow the patient to get the most out of the therapy. There are several factors that can affect the horse’s movement and thus the therapy. These factors include fitness, natural asymmetry, lameness, and shoeing to name just a few. The normal stride parameters will be presented followed by the stride parameters during forelimb and hind limb lameness. The asymmetry of the trainer and/or client may also affect how the horse moves.