My 9 yr old golden has occasionally been walking in circles for several weeks. We assumed it was his eyesight, but in the last week or so, the circling has increased & he does it for several minutes at a time getting faster & faster, in a tighter circle to the point where he falls down. I did a quick search on this & it seems to be "Idiopathic Vestibular disease". But the circling is the only symptom-no head tilt, no nausea, normal eating, and drinking habits. Thoughts? He also has epilepsy, he was diagnosed about 4 years ago and takes Phenobarbital to control his episodes. Any information would be greatly appreciated!