Greyhound polyneuropathy is an inherited progressive neurologic disorder affecting Greyhounds. Affected dogs typically present between three and nine months of age with exercise intolerance and an abnormal “bunny-hopping” gait. The symptoms progress to severe muscle wasting and Ataxia. Affected dogs may also have an abnormal sounding bark, be unable to bark, have noisy breathing and/or have difficulty breathing. In severe cases dogs can die from respiratory failure, but typically, affected dogs are humanely euthanized by one year of age.