Hi serra....I'm not a vet but here's agood link for you to look thru about seizures in dogs....
http://www.doglogic.com/healthlinks2.htm
Scroll down to seisures. I dogsit for a poor boy that has seizures occasionally. He is on phenobarbital to help control them. He is 8 and has had seizures for the last 2 years. Controllable now though.
I can only imagine how scary it was to see your pup having seizures. It scared the bejesus out of me the first I saw it happen.
Good luck with finding the right reatment.