I've had two dogs with vestibular disease over the years.
I don't remember much about the first one as I was out-of-town when it occurred, and he was fairly old at the time. He had the classic head tilt, and he didn't get around as well as he had normally.
Lily, my black bitch, was my second dog that had it hit her. I was sitting here at my computer when it struck her suddenly like a seizure. She was on her side, with her legs thrashing around. When she came out of it, she had the head tilt and had trouble walking. I don't remember the time of year (spring?), except that the weather was nice out, so I began walking Lily outside several times a day with a beach towel slung under her belly as I supported her so she could walk. With time Lily improved and eventually was able to walk on her own again.
Karen Brittan