Dog Breeds With Underbites: Causes, Care & What to Expect

An underbite in dogs is when the lower jaw and teeth extend beyond the upper teeth, creating a distinctive look often associated with breeds such as the Bulldog, Boxer, and Boston Terrier. While this facial structure, known as brachycephalic prognathism, is considered a breed standard in certain dogs, it can lead to a variety of health issues depending on its severity. Mild underbites are often purely cosmetic, while severe cases can interfere with chewing, cause trauma to soft tissues, and lead to dental crowding and disease.

Dogs with underbites may struggle to pick up food, especially kibble of certain sizes or shapes, and owners may notice excessive drooling, difficulty closing the mouth completely, or signs of discomfort while eating. In severe cases, the misaligned teeth can puncture the roof of the mouth or cheeks, causing chronic pain and inflammation. Regular dental checkups are particularly important for dogs with underbites, as misaligned teeth are more prone to tartar buildup, periodontal disease, and damage.

Treatment for significant underbites typically involves veterinary dental referral. Options may include tooth extraction to prevent trauma or orthodontic intervention in young dogs before the jaw fully matures. For dogs with underbites that are part of a recognized breed standard, management is focused on monitoring and addressing any discomfort or dental issues as they arise. While many dogs live comfortably with an underbite, early veterinary assessment ensures that any functional problems are identified and addressed before they worsen.