This site is dedicated to owners of horses and equine veterinarians facing a suspected case of atypical myopathy of grazing horses. The mission of this site will be to distribute the knowledge relative to the condition, to collect information about cases around the world, to sort out preventive measures and to connect researchers trying to identify the cause of atypical myopathy. Furthermore, alert messages will be displayed on the front page of the site as soon as outbreaks are recorded by the Atypical Myopathy Alert Group (AMAG). The AMAG consists of veterinarians and researchers involved with clinical cases of atypical myopathy. Alert messages will contribute to prevent Atypical Myopathy by providing specific advice (see “prevention”). .