Categories: Nervous system phene

Cross-species summary: A degenerative disease of the brain induced by a failure of the liver to metabolise ammonia. Clinical signs include excitability, tremor, compulsive walking, head pressing, and apparent blindness, followed by coma and convulsions.

Species in which this phene is found:
dog (Canis lupus familiaris)
domestic cat (Felis catus)
sheep (Ovis aries)