We're pretty sure it was from when we suspect he fell downstairs last Christmas. Insurance will pay for him go get a brainscan but it is supposed to be a traumatic procedure so the vets are hesitant to do it. Until then they are just trying to find a drug cocktail that works, realistically though we're just buying time between seizures but it is unlikely that he'll ever be seizure free.Poor dog, really hope you find out what is causing the seizures. I have had 3 Border Collies they are great, so feel your pain.