[107barney]

Well my Teddy has both. He was diagnosed with Intention Tremors and he also had seizures. Both are genetic issues in his case.

I home cook and the symptoms have been present since puppyhood.
I home cook for my dogs with professional veterinary guidance
Home cooking has not reduced his symptoms, which have been present since we obtained him from our breeder. Nothing reduces the intention tremors, but he is now on medication to reduce or eliminate his seizures.
He has a normal liver profile including normal BATs and overall bloodwork
He does have some elevated kidney readings and has been prone to bladder issues, also thought to be genetic.
He does not have hypoglycemia.
We do not over vaccinate

You are right, it is scary, and it is not fun to have your young dog fall to the floor in a severe generalized seizure while he is wagging his tail at you. I wont even get into the emotional drain and high costs of vet care.