Paroxysmal Exercise-Induced Dyskinesia (PED) is a progressive genetic disorder characterised by dyskinetic episodes triggered mainly by exercise and stress. Symptoms include generalised ataxia, lack of coordination and balance resulting in a an exaggerated 'goose-stepping' gait, called hypermetria where the dog overreach the intended location. Increased muscle tone can be seen in all limbs as well as abnormal muscle tone, and mild tremors. In severe cases, the dog will lose its ability to walk. Episodes vary in duration from minutes or hours.
Stress management, a specific diet and pharmacological therapy resulted in the partial or complete suppression of hypertonic dyskinetic episodes and enabled a good quality of life.
The trait of inheritance is thought to be dominant, which means that one copy of the variant is sufficient to cause symptoms of the disease.