This section is from the book "The Farmers Ready Reference Or Hand Book Of Diseases Of Horses And Cattle", by S. C. Orr. . Also available from Amazon: The Farmer's Ready Reference;.
This, in the mild form, is known as Megrims, Stomach Staggers or Blind Staggers; when it is severe it is sometimes called Epilepsy.
Causes. - Undue pressure of some part of the harness, and sometimes severe constipation, or even intestinal worms will cause it.
Symptoms. - The horse often becomes sluggish, then after a time begins to stagger or plunge and falls to the ground.
Treatment. - Remove all harness that might cause pressure, and wet the top of the head with cold water. If due to constipation or worms, treat as prescribed for those diseases elsewhere in this work.