This is a video of our Jack Russell Molly having an episode of what we don't know. The link to the video is at the end of this post. She will start wandering around flinching, falling down. Sometimes she gets into a corner and can't turn herself around. Last night at 2 in the morning, I found her stuck behind the refrigerator. The episodes happen 1-2 times a day and last from 15-30 minutes. We have taken her to the vet and they say it is arthritis and gave us pain pills. That has had no effect. 90% of the time she is spunky and full of energy, even though she is 16 years old, jumping and running to fetch a ball. We hate seeing her like this and feel helpless to help her. Any one have any ideas?