 Most affected animals have normal intelligence and mildly affected animals can, in theory, live out a normal lifespan.However, affected animals are quite accident-prone, and for this reason many animals that develop cerebellar abiotrophy, particularly horses, are euthanized for humane reasons.Horses may experience difficulty stepping up and over objects, run into fences, fall easily, and even if allowed to mature to full growth, are generally considered unsafe to ride.