Why is my horse lame? Why does he keep stumbling? Why does he seem to trip over his own feet? The horse suffering from back pain or injuries can exhibit symptomatic lameness, which can also manifest as behaviour issues including stubbornness or resistance. When the horse is displaying symptoms of lameness and logical treatments are not working, the horse’s owner may turn to injections, anti-inflammatory creams, or chiropractic adjustments at the sacroiliac joint.