Big big hugs to you all. I think its a seizure, we had a Shepard mix that had this problem when she aged. They started out more mild but eventually she became (hollow) inside. She just wasn't there anymore and didn't function. There was nothing that the vet gave us for them, there might have been something available but we couldn't afford anything. When we knew she wasn't herself anymore then we immediately had her put down. It was sad and scary. I am so sorry she has to go through this. My grandmother just lost her dog to cancer and the dog was her reason for living.