What is wrong when your dog walks around in circles and falls over slobbers?

Dogs that walk in circles and fall over, perhaps even while also drooling, may have a neurological condition called vestibular syndrome. This syndrome can be caused by a variety of underlying issues, including infections, inner ear disease, stroke, brain tumors, and certain medications or toxins. If your dog is exhibiting these symptoms, it is important to take them to the vet for diagnosis and treatment.