Bridgette, my Aussie, had her first seizure when she was about 3 years old. It was about 6 months after I moved, she had one about 11PM, I called the vet and he talked me through it. He told me sometimes they just have them, for no apparent reason and if they aren't too frequent then just deal with them, if they come too often then she could go on drugs. Bridgette had occassional seizures for 4 years (like once or twice a month, at the most), I did not put her on drugs as hers were pretty mild. Then after I got married and moved to the country, 5 years ago, they seemed to decrease; she had a few the first couple years, and now she has only had one that I've seen in about two years. I know this isn't exactly what you wanted to hear, but it is my experience with seizures. I didn't have any testing done on Bridgette, as hers were very mild and in just a minute or two she was back to her old self like nothing had happened. [While the seizure is happening it seems like forever, but hers are very short duration and mild. If they had become more frequent or serious, then I would have had testing done and whatever she needed. She is now 12 years old, as of Jan 17 and she is doing quite well.]