The Lameness Locator® by EquinosisTM objectively detects and quantifies body movement asymmetry in a horse using small, body-mounted inertial sensors and a hand-held tablet PC. Instrumentation of the horse is quick, easy, and completely non-invasive. Data collection is in real time and veterinarians are free to perform their usual lameness evaluation routine without distraction. Data is analyzed rapidly using a unique set of algorithms developed after 18 years of research on sound and lame horse movement. This unique set of data analysis algorithms helps to determine the affected limb or limbs, the severity of lameness within each limb and the timing of peak lameness pain within the stride cycle of each limb. Results are then presented to the veterinarian in an intuitive graphical interface that is easy to interpret and report to clients.