I suspect Bonnie is suffering from Vestibular Syndrome. Vestibular disease refers to a sudden disturbance of balance.We have created this guide to help get you started with some of the most crucial items to include in your dog walking contract. Create and download agreements for free! Head tilting usually occurs due to an abnormality in the vestibular system. Dwight Eugene Gooden (born November 16, 1964), nicknamed "Dr. Head tilting in dogs is often times due to a vestibular disorder. The vestibular nerve innervates the function of balance in your body. Dog Walking Service exclusive Agreement, Dog Walking Service Agreement Virtual Assistant Services exclusive. Apply to Pet Sitter, Dog Walker, Kennel Assistant and more!