This is a dog that came through our clinic that tested positive for distemper. The head spasm is what is called a "gum chewing" seizure.
Unfortunatly it took the owners finding us after 2 other vets had seen the dog to figure out what was actually wrong with her. The dog had been adopted from a city pound (in another state) where they only vaccinated for kennel cough before sending them on their way. So for those that think these diseases aren't out there, you are incorrect. There is a difference between not vaccinating and not over vaccinating. This sweet dog is still in treatment with no guarantees. Hopefully it all turns out well for her and her new owners.