Many dog owners search for the smallest dog breed because they want a dog that fits apartment life, is easy to carry, or works well as a companion dog. Small dogs are also popular with families, seniors, and first-time owners. But “smallest” can be confusing. Some people mean the world’s smallest dog, while others mean the smallest dog breed recognized by kennel clubs. In this article, You’ll learn which dog breed is officially considered the smallest, how size is defined by experts, and what health and care issues come with a smallest dog breed.
How “Smallest Dog Breed” Is Defined
When experts define the smallest dog breed, they do not look at rare individual dogs. Instead, they rely on breed standards set by kennel clubs like the American Kennel Club (AKC). A breed standard describes the average height, average weight, and maximum weight a dog should reach when fully grown.
Size is usually measured in two ways:
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Weight (most important for toy breeds)
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Height at the shoulder
For example, some small dogs like the Italian Greyhound have a taller frame but low weight, while others like the Chihuahua are short and very light. Breed standards focus on what dogs typically reach, not extreme cases.
The Smallest Dog Breed in the World: Chihuahua
The Chihuahua is widely accepted as the smallest dog breed in the world. According to the American Kennel Club breed standard, a Chihuahua’s maximum weight is 6 pounds, making it smaller than any other AKC-recognized breed.
Chihuahuas usually stand 5–8 inches tall, with a small, compact body and alert expression. Despite their tiny size, they are known for huge personalities. Many Chihuahua owners describe them as brave, loyal, and strongly bonded to their humans. The breed originated in Mexico, and historians believe small companion dogs existed there over 1,000 years ago. Today, Chihuahuas are popular across the US due to their adaptability to apartment life and lower space needs.
However, small does not mean fragile in behavior. Chihuahuas can be confident watchdogs and may bark at strangers. Early training and socialization are important to prevent excessive barking or territorial behavior. Because of their tiny size, Chihuahuas are best suited for homes without rough play or very small children. When cared for properly, they often live 14–16 years, which is longer than many larger dogs, according to veterinary lifespan studies.
10 Other Smallest Dog Breeds
Besides the Chihuahua, many other small dog breeds are commonly regarded as excellent companion dogs. These tiny and toy dog breeds stay small, but they differ in personality, grooming needs, energy level, and suitability for families or apartment life. All sizes below follow American Kennel Club (AKC) breed standards.
Yorkshire Terrier
The Yorkshire Terrier was originally bred to catch rats in England. Today, it is one of the most popular tiny dog breeds in the US. The Yorkshire Terrier average height is about 7–8 inches, with a maximum weight of 7 pounds. Yorkies are bold, loyal, and have huge personalities for such little dogs. Their long coat requires regular grooming. Despite their size, they can be alert watch dogs and may bark at strangers.
Toy Poodle
The Toy Poodle is one of the most intelligent small dog breeds. The toy poodle average height is under 10 inches, and they typically weigh 4–6 pounds. Unlike a standard or miniature poodle, the toy variety is ideal for apartment life. Poodles are easy to train, excel in dog sports, and are often considered a hypoallergenic dog, making them a great choice for allergy-sensitive households.
Toy Fox Terrier
The Toy Fox Terrier is a small but athletic toy breed. It usually weighs 4–9 pounds and has a smooth coat that is easy to maintain. Originally bred in the US, this breed is alert, energetic, and confident. Toy Fox Terriers are excellent watchdogs and need consistent training from an early age to manage their high energy and curiosity.
Pomeranian
The Pomeranian is known for its thick fur and lively personality. The pomeranian average height is around 6–7 inches, and most weigh 3–7 pounds. Poms are playful lap dogs but can be prone to excessive barking if not trained. They thrive on attention and enjoy spending time with their owners.
Maltese
The Maltese is a classic lap dog with a long, silky white coat. The maltese average height ranges from 7–9 inches, with an average weight under 7 pounds. Maltese dogs are affectionate, gentle, and well suited for families without very small children. Their coat requires regular care, but they are loving and calm companion dogs.
Papillon
Named for its butterfly-like ears, the Papillon is a lively toy dog. The papillon average height is about 8–11 inches, and they typically weigh 5–10 pounds. Papillons are smart, agile, and often compete in obedience training and agility dog sports despite their tiny size.
Chinese Crested Dog
The Chinese Crested dog comes in two types: hairless Chinese Crested dogs and powderpuff varieties. The Chinese Crested average height is 11–13 inches. They are affectionate, people-focused dogs that enjoy cuddling. Hairless varieties need skin care, but this breed is often chosen by owners looking for a low-shedding or hypoallergenic option.
Japanese Chin
The Japanese Chin is a small, elegant breed originally developed as a companion dog. The Japanese Chin average height is around 8–11 inches. Known for their round eyes and calm nature, they adapt well to apartment life and are generally quiet compared to other toy breeds.
Shih Tzu (Lion Dog)
The Shih Tzu, often called the “lion dog,” originated in China over 2,000 years ago. The shih tzu average height is about 9–10.5 inches. Shih Tzus are affectionate, friendly, and make great family pets, but their flat faces place them among flat-nosed breeds that can struggle in heat.
Brussels Griffon
The Brussels Griffon is a small dog with a very expressive face. Weighing 8–10 pounds, this breed is known for its affectionate temperament and strong bond with humans. Griffons thrive on attention and can develop separation anxiety if left alone too often.
Health Considerations in the Smallest Dog Breeds
While small dogs often live longer than larger breeds, their tiny size also makes them prone to specific health issues. Understanding these risks helps dog owners provide better preventive care.
Dental Disease
Dental disease is one of the most common problems in toy and small dog breeds. Small mouths mean crowded teeth, which trap food and bacteria. The American Animal Hospital Association (AAHA) reports that most dogs show signs of dental disease by age three. Daily brushing and professional cleanings are especially important for tiny dogs.
Hypoglycemia (Low Blood Sugar)
Tiny dog breed puppies, especially Chihuahuas and Yorkshire Terriers, are prone to hypoglycemia. According to the Merck Veterinary Manual, stress, missed meals, or cold temperatures can cause dangerous drops in blood sugar. Feeding small, frequent meals helps prevent this issue.
Tracheal Collapse
Many toy breeds are prone to tracheal collapse, a condition where the windpipe weakens. The University of Tennessee College of Veterinary Medicine recommends using a harness instead of a collar for small dogs.
Patellar Luxation
Patellar luxation, or loose kneecaps, is common in small breeds like the Toy Poodle and Yorkshire Terrier. The American College of Veterinary Surgeons lists this as one of the most common orthopedic conditions in toy dogs.
Injury Risk
Because of their delicate bones, small dogs are more likely to be injured by jumping from furniture or rough handling. Homes with small children should take extra care, using ramps and supervised play.
Smallest Dog Care Basics
Caring for the smallest dog breeds is different from caring for larger dogs. Their tiny size, lighter average weight, and delicate bones mean small dogs need extra protection at home.
Feeding and daily routine
Tiny dog breeds such as Chihuahuas, Toy Poodles, and Yorkshire Terriers have small stomachs. Puppies may need 2–3 small meals per day to avoid low blood sugar. The Merck Veterinary Manual explains that toy breed puppies are more prone to hypoglycemia than larger breeds.
Safety at home
Because small dogs can be injured easily, many dog owners use:
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Pet stairs or ramps for couches and dog beds
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Non-slip rugs to prevent falls
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Harnesses instead of collars (to protect the trachea)
The University of Tennessee College of Veterinary Medicine notes that toy breeds are prone to tracheal collapse, especially when pressure is placed on the neck.
Exercise and mental stimulation
Most tiny dog breeds do not need much exercise, but they still need daily walks, playtime, and mental stimulation. Short walks, puzzle toys, and obedience training help prevent boredom and excessive barking.
How to Choose a Healthy Smallest Puppy
When choosing the smallest dog breed, health matters more than size. Many problems seen in tiny dogs come from poor breeding practices.
Avoid “teacup” marketing
Terms like teacup Yorkie or micro Chihuahua are not recognized by the American Kennel Club. According to the Chihuahua Club of America, intentionally breeding dogs to be extremely small increases the risk of heart defects, bone fractures, and early death.
Look for health testing
Responsible breeders follow health testing guidelines set by breed clubs and the Orthopedic Foundation for Animals (OFA). The OFA’s CHIC program lists recommended screenings for each breed
For example, Chihuahuas and Yorkshire Terriers should be screened for:
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Patellar luxation
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Heart conditions
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Eye diseases
Signs of a responsible breeder
The American Kennel Club recommends choosing breeders who:
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Allow you to meet the puppy’s parents
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Provide written health records
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Offer a contract and return policy
A healthy puppy will grow into a healthier adult dog, even if it is not the absolute smallest.
Are the Smallest Dog Breeds Good Pets?
Yes—small dog breeds can make great pets, but only when matched to the right household.
Pros of Smallest dog breeds
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Great for apartment life
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Easier to travel with
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Often live longer than larger dog breeds
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Strong bonds with owners
Challenges to consider
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Fragile around small children
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Prone to dental disease
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Some breeds bark more than others
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Separation anxiety can occur if not trained early
FAQs
What is the smallest teacup dog?
There is no officially recognized “teacup” dog. The smallest breed is the Chihuahua, but “teacup” dogs are simply very small individuals, often bred below healthy size standards.
What is the best tiny dog to have?
The best tiny dog depends on lifestyle. Toy Poodles are easy to train, Maltese dogs are affectionate lap dogs, and Havanese dogs are great family pets. Health, temperament, and training matter more than size.
Which is the world’s smallest dog?
The Guinness World Records title for the world’s smallest dog belongs to Miracle Milly, a Chihuahua. However, this record refers to an individual dog—not a breed.
Are teacup dogs real?
Teacup dogs are not recognized by the American Kennel Club or major kennel clubs. Veterinary experts warn that breeding dogs to extreme small sizes can cause serious health problems.
Conclusion
The smallest dog breed in the world is the Chihuahua, based on official breed standards from the American Kennel Club. While many other small dog breeds exist, size alone should never be the main goal. Healthy breeding, proper care, and a good match with your lifestyle matter far more than having the tiniest possible dog. Small dogs can be loving, loyal, and full of personality—but they depend on responsible dog owners to thrive.
