This is a video of a horse with classic signs of tetanus. The horse is displaying a “sawhorse” stance, facial grimace, “lockjaw”, and spasms of the third eyelid. Tetanus is uncommon in horses because it is so easily preventable with annual vaccination, but without regular vaccination horses are extremely susceptible to this condition. Horses usually contract tetanus via a scrape, cut or puncture wound that becomes infected with tetanus spores present in their environment (in the dirt or on metal