Equine Polysaccharide Storage Myopathy): A muscle wasting condition seen in Draft horses and other breeds. For more information: EPSM

EPSM or Equine Polysaccharide Storage Myopathy is a muscle disease most commonly associated with heavy horse breeds including the Clydesdale, Shire, and Percheron. It is estimated that approximately 2/3 of all draft horses show evidence of EPSMhttp://www.ruralheritage.com/vet_clinic/epsm.htm. However, EPSM may also occur in light horse breeds or horses that have draft lineage.