My dog had her first seizure when she was 8. That year she had 2 during the day (1 grand mal, other none convulsive). Then they disappeared for 2 years. She’s now 10, and they are back. Since March she’s had 4 grand mal’s in the early morning hours while sleeping. Vet wants to wait on treatment until they are more than 1 per month. They are now happening every 1-3 months. Is it possible to have a brain tumor that long and have no other symptoms, or is it most likely something else? Any suggestions or advise would be greatly appreciated.