here is another response from a member
Definitely something neurological and considering the vaccinations recently and being a Yorkie, it's sure a big chance.
Aside from sudden sadness watching that video, it absolutely INFURIATES me that the veterinary community does nothing about the amount of vaccine small dogs get. They get the same amount for their little amount of weight as a Great Dane. Can you believe that? When will it change? No wonder there are few big dog breeds that come down with GME.