Appears to be an inflammation of one side of the brain only, producing a tendency to turn round in a circle, like " the gidd" of sheep. It is rather a rare disease, and is easily recognised by the above characteristic sign. There is no apparent constitutional disturbance, and the dog eats much as usual; but the moment he attempts to walk he begins to turn round. In a case which I saw some years ago, the dog recovered by the use of a seton, with purgatives, followed by nitrate of silver, given three times a day in a pill, as follows:-

Nitrate of silver, carefully powdered, 2 grains; crumb of bread, enough to make eight pills.