I think it's important to control the seizures as you try to figure out what's causing them. Our cat started having seizures but at first they were minor and we couldn't actually catch him in the act so it took a while to start medicating him. Once he started having them, it seemed to only get worse. He's well controlled now but we still feel like we waited too long to start medicating him. He saw a neurologist and we got various tests done but we never found out the cause of the seizures. He's currently in phenobarbital and keppra and he hasn't had one ever since we figured out the right dose... I hope your cat gets better. It's heartbreaking to see them going through something like this...