Old dog syndrome

My 12.5 year old Shiba Inu mix has come down with this just this week. It's a loss of balance and control. It was awful, for her and me. Vet said this will pass in a couple weeks, provided it's not a brain issue. Idiopathic vestibular disease is the official name for this. It's not pleasant to watch, especially since she was an energetic dog her whole life. I thought some of you may have experienced this in the past (your dog)? Especially Gary with all the pups around. Anybody?Thanks