The dog has no fit in this disease, but walks about apparently without an- object, generally in circles and always in one direction. Youatt ascribes the disease to the presence of hytadids in the brain, but results of more recent study of animal parasites are opposed to this view. Worms in the stomach or intestines is more likely to be the cause. Give the dog a few doses of Sure Shot, Glover's, Dent's or Clayton's Vermifugs. Also put the dog in a room or small kennel yard where he can not injure himself by running against things, as he might, due to his sight being impaired.