That can be an early indication of a vestibular syndrome attack about to come on. My old wolfhound cross did that for about a week before his first fullblown attack- which was a really significant one. I really thought initially he'd had a stroke. Thankfully he hadn't, it was just a vestibular attack, but the symptoms are identical and sometimes without a scan even vets struggle to differentiate the two, so take him back, I bet this is ear related as my old fella had ear issues before as well.