Epilepsy and seizures are uncommon in horses. Causes are multiple and often related to certain predisposing conditions, such as congenital seizures in Arabian foals or certain infectious agents. Without more information about the situation, it is difficult to provide pertinent information for your situation. However, it is essential to try to determine the cause of the seizures. The diagnosis will determine if treatment or control of the seizures is a viable option. Also, any time a horse has seizures, it is potentially a dangerous situation for both the horse and the handler. Only people with extensive experience with horses should be handling the horse, and the horse should be housed in facilities that are as safe as possible.
To evaluate a horse with seizures, it is first necessary to obtain a very detailed history for the horse. If the seizures can be recorded prior to evaluation by a veterinarian, it is often very useful in determining the possible causes. If specialized diagnostics are needed, such as CT scans, MRI, radiographs of the head, etc., the horse will need to be seen by a hospital/referral center.
