I experienced the same thing w/Coco Puff shortly after moving into this house. He did have a slight seizure because, as it turns out, he is a cerebellar hypoplasia cat. He has never had another seizure since, though. Also, I can tell you that years ago my dog Charmin had seizures and she took phenolbarbitol and she lived to be 18 1/2 years old. And they were quality years, too. So, try not to worry too much. I'm sure your vet will know just what to do. A candle burns for you all. Keep us posted.

Blessings,
Mary