When is a Mastidoodle Full Grown?
The timing for when a Mastidoodle reaches full grown size can vary, as it depends on several factors, including genetics and individual growth rate. Mastidoodles are a mixed breed resulting from crossing a Mastiff and a Poodle. Mastiffs are generally large dogs, while Poodles come in different sizes (standard, miniature, and toy).
On average, Mastidoodles may reach their full grown size between 1.5 to 2 years of age. However, some may continue to fill out and develop muscle mass beyond this age, even up to 2.5 years or so.

It’s important to note that smaller-sized Poodles in the mix can lead to smaller Mastidoodles, while larger-sized Mastiffs can produce bigger Mastidoodles. The size of the parents and the generation in the mix (F1, F1B, etc.) can also influence the final size of the Mastidoodle.
If you have a Mastidoodle puppy, you can expect them to go through rapid growth and development during the first year, but their growth rate will slow down as they approach adulthood. Proper nutrition, exercise, and regular vet check-ups are essential during this growth phase to ensure they reach their full potential in a healthy manner.
What Impacts the Size of a Mastidoodle?
The size of a Mastidoodle, like any mixed-breed dog, is influenced by several factors, including:
Parental Size: The size of the Mastiff and Poodle parents plays a significant role in determining the size of their offspring. If a larger Mastiff is bred with a standard-sized Poodle, the resulting Mastidoodles will likely be larger than if a smaller Mastiff is bred with a miniature or toy Poodle.
Generation: The generation of the mix also matters. An F1 Mastidoodle is a first-generation cross between a purebred Mastiff and a purebred Poodle. Subsequent generations (F1B, F2, etc.) may vary in size depending on the mix of genes from each breed.
Genetics: The genetic makeup of the individual Mastidoodle puppy will influence its size. Each puppy inherits a unique combination of genes from its parents, which can result in a range of sizes even within the same litter.
Nutrition: Proper nutrition during the puppy’s growth stage is essential for reaching its full potential size. A balanced diet that meets the puppy’s specific nutritional needs will promote healthy growth.
Health: Health conditions can affect growth and development. Puppies with health issues may not reach their full size as expected.
Exercise: Regular and appropriate exercise helps promote healthy muscle development and overall growth.
Early Life Care: Early life care and socialization can also influence a dog’s overall development and temperament.
Spaying/Neutering: Some studies suggest that early spaying or neutering of dogs can lead to slightly larger sizes, while others indicate it may have a minimal effect.
Due to these various factors, it’s challenging to predict the exact size a Mastidoodle will reach as an adult. As a responsible dog owner, providing a balanced diet, regular exercise, and proper healthcare will ensure your Mastidoodle grows up to be healthy and happy, regardless of its final size.
How Big Do Mastidoodles Get?
The size of Mastidoodles can vary widely depending on the size of their Mastiff and Poodle parent breeds, as well as other factors like genetics and generation (F1, F1B, etc.). Generally, Mastidoodles are considered to be large dogs due to the Mastiff’s size, but their exact measurements can differ.
On average, the height of a Mastidoodle can range from 22 to 30 inches (56 to 76 cm) at the shoulder, and their weight can vary between 70 to 130 pounds (32 to 59 kg).
Again, it’s essential to remember that individual Mastidoodles can fall outside this average range. Some may be smaller, especially if they have a miniature or toy Poodle parent, while others can be larger if they have a larger Mastiff parent. Additionally, factors like nutrition, health, and exercise can also influence a Mastidoodle’s size.
If you are considering getting a Mastidoodle, it’s a good idea to meet the puppy’s parents to get an idea of their size and temperament. However, keep in mind that mixed-breed dogs can inherit traits from either parent, so there may still be some variation in the size of the puppies within the same litter.
When Do Mastidoodles Stop Growing?
The timing for when Mastidoodles stop growing can vary, as it is influenced by factors such as genetics, parental size, and individual development rate. On average, Mastidoodles reach their full height and weight between 1.5 to 2 years of age.
However, it’s important to note that while most of their physical growth in terms of height and length slows down after this period, they may continue to fill out and gain muscle mass up to around 2.5 years or so. During this time, they might also undergo some changes in their coat texture and appearance.
It’s essential to provide proper nutrition, exercise, and regular vet check-ups during this growth phase to ensure they develop into healthy adults. As with any dog, individual variations can occur, and some Mastidoodles may stop growing earlier or continue developing for a slightly longer period.
Keep in mind that large breeds, like Mastidoodles, can have extended puppyhoods, and their skeletal and muscular development requires time and care to avoid issues like joint problems later in life. Always consult with a veterinarian for specific guidance on caring for your Mastidoodle during its growth and development stages.
When Do Mastidoodles Calm Down?
Mastidoodles, like many large breeds, tend to have an extended puppyhood and may take a bit longer to mature both physically and behaviorally. While individual dogs can vary, they usually start to show signs of calming down and becoming more settled between 2 to 3 years of age.
During the first couple of years, Mastidoodles go through their adolescent phase, which is characterized by increased energy, curiosity, and sometimes challenging behavior. They might be more excitable, playful, and may test their boundaries.
As they approach 2 to 3 years of age, you can generally expect them to become more balanced, calm, and easier to handle. They should have better impulse control and a more predictable temperament. By this age, most Mastidoodles will have passed through their most active and rambunctious phase.
However, it’s important to remember that all dogs are individuals, and their temperament and behavior can be influenced by various factors, including socialization, training, and their environment. Some Mastidoodles might calm down a bit earlier, while others might take a little longer to mellow out.
Consistent training, positive reinforcement, and providing regular physical and mental stimulation throughout their early years will help in shaping a well-behaved and well-adjusted adult Mastidoodle. If you have any concerns about your Mastidoodle’s behavior, consulting with a professional dog trainer or behaviorist can be beneficial in addressing any specific challenges you might be facing.
Do Males and Females Grow the Same Size?
In general, male and female Mastidoodles can grow to be similar in size, but there can be some differences between them. Just like with any dog breed, individual variations occur, and some males may be larger than females, while others may be smaller.
The size difference between male and female Mastidoodles is typically not as pronounced as in some other dog breeds, but it can still be noticeable. Male dogs tend to have more muscle mass and may appear bulkier, while females might have a more streamlined and slender build.
The size of a Mastidoodle is primarily influenced by genetics and the size of their Mastiff and Poodle parents. If the male Mastiff parent is significantly larger than the female, it might result in larger male Mastidoodles. Conversely, if the size difference between the parents is smaller, the size gap between males and females may be less noticeable.
If you’re concerned about the potential size of a Mastidoodle, it’s a good idea to meet the puppy’s parents to get an idea of their size and stature. However, keep in mind that mixed-breed dogs can inherit traits from either parent, so there can still be variation in the size of individual Mastidoodles within the same litter.
Ultimately, whether you choose a male or female Mastidoodle, the most important factor is ensuring they receive proper care, training, and love to thrive as a happy and healthy companion.
How To Measure the size of a Mastidoodle?
Measuring the size of a Mastidoodle involves taking accurate measurements of its height and weight. Here’s how you can do it:
Measuring Height:
- Stand your Mastidoodle on a flat surface, such as a level floor or ground.
- Use a measuring tape or a yardstick/ruler to measure from the ground up to the highest point of the shoulders (also known as the withers).
- Make sure the dog is standing in a natural, upright position without slouching or stretching.
- Take note of the measurement in inches or centimeters. This measurement represents the dog’s height at the shoulder.
Weighing:
- For smaller Mastidoodles, you can use a household scale to weigh them. First, weigh yourself without the dog, then weigh yourself while holding the dog, and calculate the difference.
- For larger Mastidoodles, a veterinary clinic or a pet store might have scales that can accommodate their size.
It’s important to remember that these measurements provide a general idea of your Mastidoodle’s size, but they may not be as accurate as professional measurements taken by a veterinarian. If you’re curious about your dog’s exact size or have concerns about their growth, consult your veterinarian, who can provide more precise measurements and ensure your Mastidoodle is developing healthily. Additionally, regular vet check-ups are essential for monitoring your dog’s growth and overall well-being.
Mastidoodle Life Expectancy
The life expectancy of a Mastidoodle can vary depending on factors such as genetics, overall health, diet, exercise, and the level of veterinary care they receive. As with any mixed-breed dog, predicting the exact lifespan of a Mastidoodle can be challenging due to the genetic diversity they inherit from both the Mastiff and Poodle breeds.
On average, Mastidoodles can have a life expectancy of around 10 to 12 years. However, some may live longer, while others may have a shorter lifespan. It’s not uncommon for larger dog breeds, like the Mastiff, to have a slightly shorter lifespan compared to smaller breeds.
To give your Mastidoodle the best chance of living a long and healthy life, make sure to provide them with:
Quality Nutrition: Feed your dog a balanced and appropriate diet to meet their nutritional needs throughout different life stages.
Regular Exercise: Ensure your Mastidoodle gets enough exercise to keep them physically fit and mentally stimulated.
Veterinary Care: Schedule regular check-ups with a veterinarian and stay up-to-date with vaccinations, parasite prevention, and other health-related matters.
Weight Management: Maintain a healthy weight for your Mastidoodle to reduce the risk of obesity-related health issues.
Dental Care: Take care of their dental hygiene to prevent dental problems.
Socialization and Training: Proper socialization and training can help prevent behavioral issues and make them well-adjusted members of your family.
By taking good care of your Mastidoodle and addressing any health concerns promptly, you can help ensure they live a happy and healthy life for as long as possible.
Fun Facts About Mastidoodles
Designer Dog Breed: Mastidoodles are considered a “designer dog” breed, resulting from crossing a purebred Mastiff and a purebred Poodle. This crossbreeding is done to combine desirable traits from both parent breeds.
Size Variation: Mastidoodles can come in various sizes depending on the size of their Mastiff and Poodle parents. Some can be as large as their Mastiff parent, while others may be smaller if the Poodle parent is a miniature or toy size.
Hypoallergenic Potential: As a Poodle mix, some Mastidoodles may inherit the Poodle’s hypoallergenic coat. This can make them a better option for people with allergies, but it’s essential to remember that coat characteristics can vary within a litter.
Gentle Giants: Mastidoodles tend to be gentle and affectionate, inheriting their gentle and loving nature from both the Mastiff and Poodle parents.
Guard Dog Qualities: Due to their Mastiff heritage, Mastidoodles can have protective instincts, making them excellent guard dogs that will be loyal to their families.
Playful and Energetic: While they may be gentle and calm as adults, Mastidoodle puppies can be quite playful and energetic during their early stages of life.
Intelligent and Trainable: Being a mix of two highly intelligent breeds, Mastidoodles are generally quick learners and respond well to positive reinforcement training methods.
Companionship: Mastidoodles are known for their loyalty and affection towards their owners, making them excellent family pets and companions.
Great with Children: Thanks to their gentle and patient nature, Mastidoodles can get along well with children, making them excellent family dogs.
Socialization Importance: Early socialization is essential for Mastidoodles to ensure they grow up to be well-adjusted and well-behaved dogs, as it helps them become more comfortable around other people and animals.
Therapy Dogs: Their calm and loving temperament makes some Mastidoodles well-suited for therapy work, providing comfort and emotional support to people in need.
Remember that each Mastidoodle is an individual, and while they may share certain traits as a breed, their personalities can vary widely based on their upbringing, training, and experiences. If you’re considering adding a Mastidoodle to your family, take the time to meet the puppy’s parents, learn about their temperament, and ensure you can provide them with the love and care they deserve.
Mastidoodle Full Grown: Frequently Asked Questions
When is a Mastidoodle considered fully grown?
Mastidoodles are generally considered fully grown between 1.5 to 2 years of age. However, some may continue to develop and gain muscle mass until around 2.5 years old.
What impacts the size of a Mastidoodle?
The size of a Mastidoodle is influenced by factors like genetics, parental size, generation (F1, F1B, etc.), nutrition, health, and exercise.
How big do Mastidoodles get?
Mastidoodles can range in height from 22 to 30 inches (56 to 76 cm) at the shoulder and weigh between 70 to 130 pounds (32 to 59 kg).
When do Mastidoodles stop growing?
Mastidoodles usually stop growing in terms of height and length between 1.5 to 2 years of age. However, they may continue to fill out and gain muscle mass up to around 2.5 years old.
When do Mastidoodles calm down?
Mastidoodles tend to start calming down and becoming more settled between 2 to 3 years of age. During this time, they should show better impulse control and a more predictable temperament.
Do males and females grow the same size?
Male and female Mastidoodles can grow to be similar in size, but there can be some differences, with males often having more muscle mass.
How to measure the size of a Mastidoodle?
To measure a Mastidoodle’s height, use a measuring tape to measure from the ground to the highest point of the shoulders. To weigh them, use a household scale for smaller dogs or a larger scale at a vet clinic or pet store for bigger dogs.
What is the life expectancy of a Mastidoodle?
The life expectancy of a Mastidoodle is around 10 to 12 years, but this can vary based on individual factors like genetics and health care.
Are Mastidoodles good family pets?
Yes, Mastidoodles are generally good family pets. They tend to be gentle, affectionate, and good with children, making them excellent companions.
Are Mastidoodles hypoallergenic?
Some Mastidoodles may inherit the hypoallergenic coat of their Poodle parent, but not all of them will be hypoallergenic.
Do Mastidoodles require early socialization and training?
Yes, early socialization and training are essential for Mastidoodles to ensure they develop into well-adjusted and well-behaved adults.
Can Mastidoodles be used as therapy dogs?
Yes, some Mastidoodles with the right temperament can make excellent therapy dogs, providing comfort and emotional support to people in need.
Conclusion
In conclusion, Mastidoodles are a fascinating and popular designer dog breed, resulting from the crossbreeding of a Mastiff and a Poodle. Their size, temperament, and appearance can vary depending on their parent breeds and other factors.
Mastidoodles typically reach their full grown size between 1.5 to 2 years of age, with some continuing to fill out and develop muscle mass until around 2.5 years old. They are known for their gentle and affectionate nature, making them great family pets and potential therapy dogs.
Their size can range from 22 to 30 inches at the shoulder and weigh between 70 to 130 pounds, but individual variations can occur. Males and females may have slight differences in size, with males generally having more muscle mass.
To ensure a healthy and well-behaved Mastidoodle, early socialization and positive reinforcement training are essential. Providing them with proper nutrition, regular exercise, and regular veterinary check-ups are crucial for their overall well-being.
Mastidoodles have an average life expectancy of around 10 to 12 years, but this can vary based on various factors.
If you are considering adding a Mastidoodle to your family, it’s important to research and choose a reputable breeder or consider adoption from a rescue organization. Proper care and love will help these gentle giants thrive and become cherished members of your family for years to come.