I have a friend that had a dog that was epilectic and it had seizures. It sounded like what your dog is doing maybe the same thing. However no one can be sure unless you check it out with a vet. That can be exspensive but is worth it so your dog can be treated. If it is something else you most likely would want to know. Also it would be a good idea to let your breeder know so they can prevent it from happening again..