Some dogs charm us with their quirky features, and one of the most distinctive among them is the underbite. This unique dental trait, where the lower jaw extends beyond the upper jaw, is commonly seen in small to medium-sized dogs and often results in a snaggletoothed or pouty expression. While it might look a bit unusual, an underbite is typically just a genetic characteristic and not necessarily a medical issue, though it can affect how a dog eats or chews.
Technically referred to as a Type 3 Malocclusion, this canine malocclusion is a condition where a dog’s teeth are misaligned. It occurs when the bottom teeth protrude forward and don’t meet properly with the upper teeth when the mouth is closed. Some dogs may only have a slight underbite, while others have a more noticeable misalignment with exposed canines. These cases require attentive care, particularly when it comes to feeding and oral hygiene.
In this article, we’ll explore a list of dog breeds that are known for their underbites. From adorable companion pups to stubborn little charmers, these breeds wear their dental quirks with pride and a lot of personality.
Dog Breeds with Underbites
1. Cavalier King Charles Spaniel
Among the most elegant and affectionate of toy breeds, the Cavalier King Charles Spaniel is known for its charming demeanor and graceful appearance. Despite their reputation for near-perfect scissor bites, many Cavaliers are actually prone to underbites, sometimes quite visibly from birth.
This jaw alignment issue can range in severity, often developing without intervention during early growth stages. Britannica mentions that the Cavalier King Charles Spaniel is highly favored for its affectionate, gentle, and endearing temperament. Their sweet expression and silky coat, paired with their quiet nature, make them adored companions in homes of all sizes.
Health
For Cavaliers with underbites, routine dental monitoring is essential. Malocclusion can affect chewing, contribute to plaque buildup, or lead to jaw discomfort if not properly managed. While not all underbites result in complications, it’s important for owners to be proactive, especially during puppyhood, by seeking veterinary guidance to assess jaw alignment.
Though they don’t bark much and tend to be gentle in temperament, Cavaliers are energetic enough to enjoy walks, swimming, and agility activities, all of which help maintain overall health.
Fun Fact: Although considered scissor-bite ideal, many Cavalier King Charles Spaniels naturally develop underbites that may go unnoticed unless specifically examined during growth.
2. Pekingese
The Pekingese is a regal toy breed with deep roots in ancient China, originally bred for nobility and palace life. Known for their proud bearing, flowing coats, and independent nature, these compact dogs are both affectionate and opinionated. The AKC describes the Pekingese as devoted, loving, and dignified in demeanor.
Their small stature, typically ranging from 8 to 14 pounds and standing just 6 to 9 inches tall, makes them ideal for calm, indoor living. A signature trait of many Pekingese is their noticeable underbite, often visible as one or two teeth peeking out from their mouth, adding to their unique, expressive appearance.
Health
Because of their flat faces and underbites, these small dogs are susceptible to specific dental and jaw-related issues. The misalignment can cause discomfort or pain, especially when their jaw is overused. Careful attention must be paid to diet and dental hygiene to avoid exacerbating malocclusion.
Additionally, their prominent eyes require protection, as their short muzzles leave them more vulnerable to irritation or injury. Owners should also be mindful of their tolerance for heat and opt for cooler environments whenever possible.
Fun Fact: These flat-faced dogs were once bred exclusively for Chinese royalty and are still affectionately known for their lion-like appearance and dignified, “rolling” gait.
3. English Bulldog
The English Bulldog is a beloved breed recognized for its iconic wrinkled face, stocky build, and sweet, dependable nature. Often described as gentle, affectionate, and people-focused, Bulldogs make excellent family pets and tend to bond deeply with children.
While originally bred for bull-baiting, a trait that contributes to their courageous demeanor, modern Bulldogs are far more relaxed and sociable, though these affectionate dogs may show aggression toward unfamiliar dogs.
Hills Pet describes the English Bulldog as a sturdy, muscular dog with a distinctive waddling gait that reflects its strength, steadiness, and energy. Their charming underbite and smushed facial features give them a signature expression that’s impossible to miss.
Health
Underbites in English Bulldogs are not only common but expected; they exhibit a pronounced type 3 malocclusion where the lower incisors jut outward beyond the upper jaw, even when the mouth is closed. This unique jaw structure can sometimes lead to issues with chewing or dental hygiene.
Bulldogs are also prone to other health concerns, including skin infections within their facial folds and conditions like atopic dermatitis. Daily cleaning of their facial wrinkles is necessary to prevent moisture buildup and potential skin infections.
Fun Fact: Despite their tough exterior, English Bulldogs rarely bark and are known for being surprisingly quiet and cuddly companions with moderate to low energy levels.
4. Shih Tzu
The Shih Tzu is a small dog with royal roots tracing back to ancient China and the Ming dynasty. Known for its sweet personality, long flowing coat, and charming expression, this toy breed has won the hearts of dog lovers worldwide. WebMD states that the Shih Tzu is known for its affectionate, cheerful, and fun-loving personality.
One of its most defining features is its short, flat muzzle and natural underbite, present from birth. While these traits contribute to the breed’s unique appearance, they also place the Shih Tzu among the most recognizable dog breeds with underbites.
Health
Though often harmless in puppies, a Shih Tzu’s underbite can lead to chewing and biting difficulties as the dog ages. Their undershot bite may cause uneven tooth wear or discomfort if not monitored. Regular dental checkups are crucial to identify early signs of malocclusion-related issues.
Their compact snout can also make them more sensitive to heat and prone to breathing difficulties, so care should be taken during warmer months. Daily playtime, short walks, and mental enrichment help maintain their physical and emotional well-being.
Fun Fact: The Shih Tzu was officially recognized by the American Kennel Club in 1969, despite being one of the oldest known breeds in existence.
5. Chihuahua
Tiny but bursting with personality, the Chihuahua is one of the smallest dog breeds in the world and certainly one of the boldest. Petplan describes the dog as a spirited companion that flourishes with affection and care. These spirited toy dogs are lively, expressive, and known for their terrier-like attitude, domed skulls, and pointed muzzles.
Chihuahuas are also frequent contenders in the conversation about underbites, though their misaligned teeth may not always be visible unless they open their mouths. Their petite size and delicate build make them particularly susceptible to dental quirks like underbites, which can affect their overall comfort and feeding habits.
Health
Due to their small mouths and tight jaw structures, Chihuahuas are highly prone to dental issues, including underbites, overcrowded teeth, and gum disease. These conditions often lead to tartar buildup, gingivitis, and eventually periodontal disease if not treated.
Infections from advanced dental issues can even spread to vital organs like the liver or kidneys. To manage these risks, Chihuahuas require a tailored diet, regular brushing, and professional dental cleanings to maintain oral health and overall well-being.
Fun Fact: While a Chihuahua’s underbite is often hidden with a closed mouth, it can cause feeding sensitivities, making a specialized diet especially important for this tiny breed.
6. Maltese
The Maltese is a small yet regal breed, adored for its flowing white coat and lively personality. Despite its dainty, ornamental appearance, this toy dog is bursting with energy and unwavering loyalty. Known for forming deep bonds with their owners, Maltese dogs thrive on companionship and can struggle with separation anxiety if left alone for long periods.
Their compact build, sloping shoulders, and elegant posture give them a graceful presence, while their playful temperament adds a layer of charm.
Health
Underbites are quite common in the Maltese breed and are largely hereditary. This dental misalignment, where the lower jaw extends beyond the upper, can sometimes lead to complications. While many cases are mild, some may require veterinary correction through dental braces or extractions.
Regular dental checkups and early intervention are crucial in preventing long-term issues. Though small in size, typically weighing 4 to 8 pounds, Maltese dogs are high-energy and need consistent exercise and grooming.
Fun Fact: The Maltese’s elegant appearance, complete with a silky white coat and tufted tail, is paired with a surprisingly high genetic tendency toward underbites.
7. Pomeranian
The Pomeranian, a tiny breed with a big personality, is instantly recognizable by its fluffy coat, alert expression, and fox-like face. Though they weigh just 3 to 7 pounds and stand only 7 to 12 inches tall, Pomeranians are bold, vocal, and fiercely loyal.
Their playful nature and charm make them a favorite among families, particularly those with children. One feature that often adds to their unique appearance is an underbite, which, while endearing, can present certain challenges.
Health
Pomeranians with underbites require special attention when it comes to diet and oral care. Their misaligned jaw can make eating and chewing difficult, and if paired with improper food choices, may lead to bad breath or other dental issues.
Because of their small mouths and fast metabolism, it’s important to feed them nutrient-rich, small-breed food in small, frequent portions. Proper dental hygiene, including regular brushing and vet checkups, is essential to prevent long-term oral health problems.
Fun Fact: Mozart had a Pomeranian named Pimperl to whom he dedicated an aria, and Michelangelo reportedly kept one beside him while painting the Sistine Chapel.
Conclusion
Underbites can be an endearing trait in many breeds, but they often require special attention to maintain a healthy dog’s mouth. Breeds like the Cavalier King Charles Spaniel and Pomeranian may develop visible underbites early in life, sometimes due to retained baby teeth or misaligned adult teeth. Without proper care, this condition can lead to tooth-to-tooth contact issues, potentially causing tooth decay, dog pain, or difficulty eating.
Regular dental checkups are essential for monitoring the condition of your dog’s teeth, especially the lower teeth, which are most often affected by underbites. In more severe cases, veterinarians may recommend dental extractions or even oral surgery to relieve oral pain and prevent further complications. While an underbite can be part of a breed’s charm, it’s important for pet owners to recognize when extra care is needed and take proactive steps to ensure their dog stays happy, comfortable, and pain-free.
