Hi.
I know how scary seizures can be in your dog. My older guy suffered from them since I got him from BRAT at age 7ish. He lived to 15. I never found out exactly what the cause was and they happened for the most part infrequently. Very Occasionally there would be 2 in one week, but mostly it happened maybe 3-4 time a year, and certainly there were more towards the end of is life at 15 but for the most part we just suffered through them together… In most cases, as he got older they seemed to work as a reset and within a day or two he would actually be more energetic and recharged than he was before. I thought of it as a watch winding down that then got wound. I weighed out the side effects of the meds, vs the side effects of the seizures and chose not to medicate. In the end the seizures may have played a role in the end of his life but it was a great one and the seizures were just a small part of it.
Also, and i have no proof that this is true of really helpful (but it made me feel better) I would give him dairy following a seizure. I have been told there is something in dairy products which is replenishing to something lost during a seizure. So after the seizure, and a walk (when he could) to shake the willies out, we would come in and he would get a small bowl of vanilla ice cream.
Im sorry or what you are going through. It is so scary when your dog is suffering and you cant stop it.
Hang in there, Erica