Trigeminal neuritis is a disease of sudden onset where the fifth cranial nerve (trigeminal nerve) becomes inflammed. This results in drooling, difficulty eating or drinking, jaw paralysis and the inability to close the mouth. Guiness is a very happy 5-year-old chocolate lab that recently developed this condition. While relatively uncommon, trigeminal neuritis usually resolves in 1-6 weeks with supportive care such as diet changes to allow the pet to eat (soft food made into meatballs usually works!). The cause of trigeminal neuritis is currently unknown, however most dogs make a full recovery.