When Is A Yorkshire Terrier Full Grown?


When is a Yorkshire Terrier full grown? Discover the key factors that determine their growth journey, including age, size, and genetics.

Have you ever wondered when a Yorkshire Terrier reaches its full size? We know how exciting it is to welcome a new bundle of joy into your home, and one of the many questions that may arise is when your adorable little Yorkie will reach their adult size. Understanding the timeline of a Yorkie’s growth can help you provide the best care and attention to ensure their healthy development. In this article, we will explore the key factors that determine when a Yorkshire Terrier is considered full grown, including their age, size, and genetics. So, let’s uncover the secrets of a Yorkie’s growth journey together!

When Is A Yorkshire Terrier Full Grown

Growth Stages of Yorkshire Terriers

Newborn Stage

The newborn stage of a Yorkshire Terrier’s life is from birth until about two weeks of age. During this stage, the puppies are completely dependent on their mother for nourishment, warmth, and care. They are unable to walk or see clearly, relying on their sense of smell and touch to navigate their surroundings. At this stage, it is crucial to provide a safe, warm, and clean environment for the puppies and ensure that they receive proper nutrition from their mother’s milk.

Puppy Stage

The puppy stage of a Yorkshire Terrier’s growth begins at around three weeks and lasts until they reach six months of age. During this stage, the puppies start to explore their surroundings and learn basic social skills. They begin to develop their senses of sight and hearing, allowing them to interact with their littermates and humans more actively. It is important to socialize the puppies during this stage, exposing them to various stimuli and experiences to help shape their behavior and ensure they grow into well-adjusted adults.

Adolescent Stage

The adolescent stage occurs between six months and one year of age. Yorkshire Terriers at this stage are still growing, both physically and mentally. They may exhibit increased energy levels, challenging behaviors, and a desire to assert their independence. Training and consistent discipline during this stage are crucial in shaping their behavior and teaching them proper manners. Proper exercise and mental stimulation are also essential to prevent behavioral problems and promote healthy growth.

Adult Stage

The adult stage of a Yorkshire Terrier’s life begins around one year of age. At this stage, they have reached their full physical and mental maturity. Their growth plates have closed, and their size and appearance are fully developed. Yorkshire Terriers are considered adults at this stage and should be treated as such in terms of care, training, and exercise routines.

Factors Affecting Yorkshire Terrier Growth


Genetics play a significant role in the growth and development of Yorkshire Terriers. The genes inherited from their parents determine their size, bone structure, coat quality, and overall appearance. Responsible breeders carefully select breeding pairs to ensure healthy and ideally proportioned offspring. However, it is important to note that genetics alone cannot guarantee the desired growth and development; other factors such as diet, exercise, and healthcare also play important roles.

Diet and Nutrition

Proper diet and nutrition are crucial for Yorkshire Terrier growth. Puppies require a balanced diet that provides all the necessary nutrients for their development. High-quality puppy food specifically formulated for small breeds should be provided in appropriate amounts and at regular intervals. As Yorkshire Terriers transition into adulthood, their food should be adjusted accordingly. A nutritious diet ensures proper growth, healthy weight management, and overall well-being.

Exercise and Activity

Regular exercise and activity are essential for the healthy growth and development of Yorkshire Terriers. Physical activity helps build strong muscles, maintain a healthy weight, and promote cardiovascular health. Yorkshire Terriers are energetic dogs that require daily exercise to prevent obesity and maintain their mental and physical well-being. Engaging in activities such as walks, play sessions, and interactive games not only promotes growth but also strengthens the bond between pet and owner.

Health and Veterinary Care

Proper health and veterinary care significantly impact Yorkshire Terrier growth. Regular check-ups with a veterinarian ensure that any health concerns or developmental issues are addressed promptly. Vaccinations, parasite prevention, and dental care are all essential aspects of maintaining a healthy Yorkshire Terrier. Regular veterinary visits also provide an opportunity to discuss any concerns regarding growth and ensure that the dog’s overall health is optimal.

Average Size and Weight of Yorkshire Terriers


Yorkshire Terriers are small-sized dogs, typically weighing between 4 to 7 pounds (1.8 to 3.2 kilograms) as adults. They have a compact and sturdy build, with an overall height of 6 to 9 inches (15 to 23 centimeters) at the shoulder.


The weight of Yorkshire Terriers can vary slightly depending on factors such as genetics, diet, and exercise. However, as adults, they generally fall within the range of 4 to 7 pounds. It is important to monitor their weight to ensure they stay within a healthy range, as both overweight and underweight conditions can lead to health problems.

Age Milestones in Yorkshire Terriers

8 Weeks

At 8 weeks of age, Yorkshire Terrier puppies are typically ready to leave their mother and join their new families. They have already undergone significant physical and behavioral development and are ready to begin their socialization and training journey with their new owners. This is a crucial stage for bonding and introducing them to new experiences in a positive and controlled manner.

12 Weeks

By 12 weeks, Yorkshire Terriers have settled into their new homes and are adjusting to their routines. They have further developed their social skills and are more receptive to training. It is important to continue their socialization during this stage, exposing them to different environments, people, and situations to ensure they grow into well-rounded adults.

6 Months

At 6 months of age, Yorkshire Terriers have reached adolescence and are experiencing hormonal changes. This stage may bring some challenging behaviors, such as increased independence or testing boundaries. Consistent training, positive reinforcement, and patience are crucial during this stage to guide them through these changes and ensure they develop into well-behaved adults.

1 Year

By the age of 1 year, Yorkshire Terriers have reached their full physical and mental maturity. They have finished growing, and their individual personalities have fully emerged. At this point, they should have completed their basic obedience training and be ready to tackle more advanced training, such as agility or tricks. It is important to continue providing mental stimulation and exercise to keep them happy and healthy.

When Is A Yorkshire Terrier Full Grown

Signs of a Fully Grown Yorkshire Terrier

Physical Appearance

A fully grown Yorkshire Terrier will exhibit the characteristic appearance of the breed. They will have a compact and well-proportioned body, a straight back, and a level top line. Their coat will be long, silky, and glossy, with colors ranging from tan to blue and gold. Their ears will stand erect, and their tail will be docked to a medium length.

Behavioral Changes

Yorkshire Terriers will generally exhibit a calmer and more settled demeanor once they reach adulthood. While they may retain their energetic and playful nature, their behavior should become more predictable and less impulsive. They will have a better understanding of boundaries and expectations, making training and discipline easier.

Dental Development

By the time a Yorkshire Terrier is fully grown, they should have a complete set of 42 adult teeth. Their dental development is an important indicator of their maturity. Regular dental care, including brushing and professional cleanings, should be maintained to ensure good oral health throughout their adult life.

The Importance of Patience in Recognizing Maturity

Varying Growth Rates

Yorkshire Terriers, like many dog breeds, can have varying growth rates. Some individuals may reach their full growth and maturity earlier than others. It is important to be patient and allow each dog to develop at their own pace. Comparing them to other dogs of the same breed or littermates may lead to unnecessary concern or unrealistic expectations.

Monitoring Progress

Regularly monitoring a Yorkshire Terrier’s growth and development is important to ensure they are on track. Tracking their weight, observing their physical changes, and assessing their behavior can help identify any potential concerns or delays in their growth. Regular vet check-ups provide an opportunity to discuss any questions or concerns with professionals who can evaluate their progress accurately.

Consulting with Breeders or Veterinarians

If there are concerns about a Yorkshire Terrier’s growth or development, it is always advisable to consult with reputable breeders or veterinarians who specialize in the breed. They can provide valuable insights and guidance based on their expertise and experience. They may also recommend specific tests or treatments to address any potential issues.

Health Considerations for Adult Yorkshire Terriers

Regular Vet Check-ups

Regular veterinary check-ups are essential for adult Yorkshire Terriers to ensure their continued well-being. Annual vaccinations, parasite prevention, and general health assessments should be part of their regular healthcare routine. Regular vet visits allow for early detection and treatment of any potential health issues, ensuring their longevity and quality of life.

Nutritional Needs

Proper nutrition plays a vital role in maintaining the health of adult Yorkshire Terriers. Feeding a balanced diet that meets their specific nutritional needs is crucial. High-quality dog food formulated for small breeds, along with appropriate portion control, helps maintain a healthy weight and provides the necessary nutrients for their overall health. It is important to avoid feeding them table scraps or unhealthy treats that can lead to obesity and other health problems.

Exercise and Mental Stimulation

Adult Yorkshire Terriers require regular exercise and mental stimulation to stay physically and mentally fit. Daily walks, play sessions, and interactive toys or puzzles help prevent behavioral problems and promote a healthy lifestyle. Tailoring their exercise routine to their individual needs, considering factors such as age, health, and energy levels, ensures they receive the appropriate amount of activity.

Grooming and Skin Care

Yorkshire Terriers have long, silky coats that require regular grooming to maintain their appearance and overall health. Brushing their coat daily helps prevent matting and tangling. Regular bathing, nail trimming, and ear cleaning are also important aspects of their grooming routine. Proper skin care, including the use of moisturizing shampoos and regular checks for skin issues, ensures their skin remains healthy and free from infections.

Determining the Right Age for Breeding

Reproductive Maturity

Determining the right age for breeding Yorkshire Terriers largely depends on their reproductive maturity. Generally, female Yorkshire Terriers reach sexual maturity between 6 to 9 months, while males may take slightly longer to develop. However, it is imperative to wait until both the male and female dogs have reached their full physical and mental maturity before considering breeding.

Health Evaluations

Before breeding a Yorkshire Terrier, it is crucial to conduct thorough health evaluations for both the prospective parents. This involves assessing their overall health, screening for genetic disorders or hereditary conditions, and ensuring they are free from any contagious diseases. Breeding healthy individuals reduces the risk of passing on potential health issues to the offspring.

Breeding Recommendations

Breeding Yorkshire Terriers should only be done by responsible and knowledgeable breeders who have a thorough understanding of the breed’s standards and genetic health. Breeders must carefully consider the temperament, conformation, and health history of both the male and female dogs, aiming to improve the breed overall. Breeding should be done for the betterment of the breed and not for profit alone.

Caring for a Fully Grown Yorkshire Terrier

Routine Exercise and Play

A fully grown Yorkshire Terrier requires daily exercise and play to maintain their physical and mental well-being. Regular walks, interactive play sessions, and opportunities for socialization with other dogs are important components of their exercise routine. Engaging in activities that stimulate their mind, such as puzzle toys or training sessions, helps prevent boredom and promotes a happy, well-rounded dog.

Balanced Diet and Nutrition

Feeding a balanced diet with high-quality dog food formulated for small breeds is crucial for the overall health of a fully grown Yorkshire Terrier. It should provide the necessary nutrients, vitamins, and minerals to support their specific needs. Portion control is also important to prevent obesity, as Yorkshire Terriers are prone to weight gain. Consulting with a veterinarian can help determine the appropriate diet for an individual dog.

Training and Mental Stimulation

Ongoing training and mental stimulation are important for fully grown Yorkshire Terriers. They thrive on learning new skills and engaging in activities that challenge their intellect. Continuing their training, teaching them fun tricks, or participating in dog sports such as agility or obedience can keep their minds active and strengthen the bond with their owners.

Maintaining Good Health

Maintaining good health in a fully grown Yorkshire Terrier involves regular veterinary check-ups, proper grooming, and preventive care. Ensuring that they receive vaccinations, parasite prevention treatments, and dental care on a schedule recommended by the veterinarian helps prevent illnesses and promotes overall well-being. Regular grooming, including brushing their coat, cleaning their ears, and trimming their nails, keeps them comfortable and free from skin or ear issues.


Understanding the growth stages of Yorkshire Terriers is essential to provide optimal care for these beloved pets. From their newborn stage to adulthood, Yorkshire Terriers undergo unique physical and behavioral changes that shape their development. Factors such as genetics, diet, exercise, and health evaluations play significant roles in their growth. Recognizing the signs of a fully grown Yorkshire Terrier, practicing patience, and providing appropriate care ensures their well-being and happiness. With the right attention and care, Yorkshire Terriers can thrive and bring joy to their owners throughout their lives.