Sasha did not have a stroke. She does not have an ear infection as such. She does have canine peripheral vestibular syndrome. Very common in older dogs, very alarming but the prognosis is excellent. She just has to ride it out. From the article I found: what is thought to happen is that the nerves of the inner ear connecting to the cerebellum, which controls balance and spatial orientation become inflamed, but why this should happen is as yet unclear. There seems to be a link to age as the disease is much more common in old dogs. The vet put her on 50 mg of benadryl daily to help alleviate her symptoms. She's not been eating with this and has lost 3 lbs already. Yesterday's dose of benadryl seemed to make her feel better so hoping it helps her ride this out.