Yes, a vet visit is warranted. It's the only way to know for sure whether or not it's a physical issue.
http://www.peteducation.com/article.cfm?c=2+2105&aid=433Pre-Seizure Phase: The pre-seizure phase is commonly called the aura. Your dog may appear restless, pace, seek affection, salivate, whine, or hide. These signs occur just minutes before the actual seizure begins.