Comment by xzXZJAsQ4

This may not apply, but I think it's worth trying. The Keto diet was originally used to treat seizures. My cat developed seizures when she was about 1 and had them for years. Medication took care of most of it, but she still had them occasionally. I didn't go full Keto with her, but got her a different food with no grains and that helped to the point where she was able to get off medicine and still had no seizures. It's possible she aged out of the seizures too - but a diet change is an easy thing to test.