The event seems to last for an hour when it is actually over in a minute or so. Usually before you can get the pet to the veterinarian, it is normal or near normal. When a pet suffers loss of consciousness, looses bowel and bladder control, has excess tearing or salivation, and trembles violently, it is experiencing what we call a seizure. Sometimes seizures of lesser intensity involve only a spasm or just a blank stare. Seizures in pets are frequently attributed to epilepsy.
Epilepsy is defined as the repeated occurrence of seizures originating from the brain.
Seizures may be caused by many diseases which can be treated or even cured. Diseases of various body organs such as diabetes or liver disease can cause seizures. Tumors and disorders of the brain can also cause them. Exposure to toxic substances such as rodent poison, or snail and slug bait, or even common worming products can cause seizures. A single seizure doesn't constitute an immediate emergency.