Well, I've never really had that with an ear infection, just a lot of inescapable pain.
You probably had the typical ear infection that most of us got more frequently as kids, and with colds as adults.
Sounds like Snugs has an "inner ear" infection. Doesn't have the pain, which makes it harder to detect. I think the vertigo is one of the predominant symptoms. They are hard to get rid of, and can make one sicker than a dog.
Only reason I know anything about them is because my ex mother in law used to get them a lot.
Hope you are feeling better soon, Snugs.

Take all your medicine, even if you are feeling better!!