We have a 12yr,-part. Husky,Akita,Border Collieand Pit Bull, one of thee sweetest and gentlest dogs besides our other hound. Question is, he takes Potassium Bromide 2.4cc a day prevention of seizures, been on it since August 2007, the poor dog had a seizure couple of days ago. He takes this medicine because he had smoke inhalation he was trapped inside a smoking truck, luckily he was picked up and out of the truck before the truck caught on fire. If this is supposed to work then why the seizure?