[Kris L. Christine]

Significant calcium deficiency can cause seizure-like episodes, have you had a blood test to check calcium and phosphorous levels? High phosphorous foods (meat, eggs, nuts) bind with calcium, as do high oxalate foods (oatmeal) and may deplete your dog's levels to a point where it will cause problems. Poison will also cause seizures.

If you have chickens, you should be aware that their droppings are extremely high in phosphorous and can cause a problem if your dog eats too many of them.

One of our dogs developed severe seizures after the second of his puppy rabies shots -- his head shook so hard we thought his eyes would pop out, it was terrifying.

Personally, I would have a complete blood count done to check for mineral levels if you don't think vaccines or something your dog is eating is causing the seizures. PLUS, I would consult a Homeopathic/Holistic veterinarian for an alternative treatment.