A seizure can make the blood glucose drop drastically.
Have you ever checked his blood glucose during one of his episodes? That would be the best way to determine if he truly is hypoglycemic.
Lady is diabetic and I check her blood sugar all the time. The new meters require such a tiny drop of blood it is very easy. I just stick her at the base of her tail.
You can get a free Freestyle meter from the company:
https://www.myfreestyle.com/freestyl...e-program.html