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Nicole Cosgrove

The Mastador is a giant mixed breed being a cross between the Labrador Retriever and the Mastiff. She is a talented dog who participates in activities that include search and rescue, jogging, agility, drugs detection, tracking, guarding and hunting. She has a life span of 8 to 14 years and is an outgoing, friendly dog with a very protective nature.

The Mastador is a great family dog but you will need to have room for her. While she will not need hours a day of exercise she will need a fair amount and regularly too so she needs an owner willing to be active with her. She will soon become an important part of the family and she will be dedicated to you, protective of you and will love you as much you will love her.

Here is the Mastador at a Glance
Average height 28 to 36 inches
Average weight 100 to 200 pounds
Coat type Short, shiny, smooth
Hypoallergenic? No
Grooming Needs Low to moderate
Shedding Low to moderate
Brushing Three times a week
Touchiness Not overly sensitive usually
Tolerant to Solitude? Moderate
Barking Rare
Tolerance to Heat Low to moderate
Tolerance to Cold Good to very good
Good Family Pet? Very good
Good with Children? Very good with socialization
Good with other Dogs? Very good with socialization
Good with other Pets? Good with socialization
A roamer or Wanderer? Moderate
A Good Apartment Dweller? Low – too big
Good Pet for new Owner? Good – size may be difficult to handle for those without experience
Trainability Moderately easy
Exercise Needs Fairly active
Tendency to get Fat High to very high
Major Health Concerns OCD, eye problems, epilepsy, heart problems, bloat, seizures, kidney problems, cancer
Other Health Concerns Joint dysplasia, skin problems, cold tail, ear infections
Life Span 8 to 14 years
Average new Puppy Price $900 to $2000
Average Annual Medical Expense $485 to $600
Average Annual Non-Medical Expense $510 to $650

Where does the Mastador come from?

The Mastador is a designer dog, part of the trend that has grown in popularity the last two to three decades. Designer dogs are mixed breeds that have been deliberately created, often given a blended name that reflects their parentage. Most designer dog try to go small as people seem to be leaning towards smaller dogs recently. But not all of them and the Mastador is an example of a giant designer dog. Take care when buying any designer breed as many have been created with no actual thought by disreputable breeders just to make money from the trend.

As with many designer dogs we do not have a lot of knowledge about where or why they were bred, there may not even be anything to know about it. We therefore take a look at the two parents that were crossed to make her to better understand her characteristics and temperaments.

The Labrador Retriever

Coming from Newfoundland in Canada the Labrador Retriever was bred at the start of the 1700s. They worked with fishermen bringing in hooks, lines and fish and so on and then were a family companion at the end of the day at home. They were then called St John’s dogs named for the capital of Newfoundland. They were greatly admired for their disposition and work ethic by visiting Englishmen in the early 1800s and were taken back to England. There they were used to hunt and were called Labradors. It is actually a good thing they thrived so in England as in their place of origins they died out due to too strict breeding taxation. In the early 1920s they were imported from England to the US. They became very popular not just there but in other countries too.

The Lab today is a very intelligent, sweet and friendly dog. He is used in various fields as a working dog such as police work, army work, hunting, therapy to name a few. He is eager to please and loyal and is very easy to train. He has a lot of energy and needs to be very active mentally and physically. Labs can vary from being laid back to quite rowdy.

The Mastiff

The Mastiff comes from an ancient breed of dog called the Molosser. Mastiff type dogs can be found across the globe through the years, the Greeks, the Egyptians, the Romans and so on. They were used as war dogs by Hannibal and Kublai Khan and many other leaders. They were also guard dogs, used for hunting and used for entertainment in fights against other fierce animals. In England they were used to guard noble and royal estates. In 1835 the breed almost disappeared when sports like bull baiting, bear baiting and dog fighting were outlawed but the increase in popularity and occurrence of dog shows in the mid 1800s helped save them. They then almost disappeared again in England due to the two World Wars but breeders used puppies brought from Canada to revive them.

Today the Mastiff is still courageous and protective but not vicious or aggressive. In fact he is quite docile and kind. He will be aloof with strangers and may tend to step forward between you and anyone he views as a threat but he will not threaten unless there is an obvious danger. He is a good watch dog and guard dog. He does not like it when family arguments occur and if you are punishing a child he may step in to protect them. He can be shy and fearful if not properly socialized and trained from a young age.


The Mastador is an affectionate and gentle dog despite her size. While she can be very protective she is not aggressive unless she perceives a real and immediate threat to her or you. She is friendly and social and loves to be energetic and active with you and then cuddle and nap after. She is a very happy dog and very smart too. She can have a stubborn side and as a puppy she tends to be a bit more excitable and then calms down as she grows into adulthood. She is a great family dog and will very quickly become an important member. She can be left alone for shorter periods but if left for too long can become destructive.

What does the Mastador look like

The Mastador is a giant dog weighing 100 to 200 pounds and she stands between 28 to 36 inches tall. She is larger than a Lab but smaller than most Mastiffs, but she is strong looking still with a deep chest, strong legs, long tail, medium muzzle and brown expressive eyes. Her ears can be upright or hanging down and her feet are large with some webbing. Her coat is silky, shiny, short and smooth and common colors are brown, white, black, yellow, gray, golden, brown and silver.

Training and Exercise Needs

How active does the Mastador need to be?

She is a fairly active dog and just because of her size will need regular activity to avoid becoming obese. She loves to walk, run, jog, play at the dog park, wrestle, swim and so on. If she has access to a yard, which would be good for a dog of this size, make sure it has high fences as she is a good jumper.

Does she train quickly?

She is moderately easy to train, she does have a stubborn side that can slow things down a little but she is intelligent and if she takes more after the Lab she could be quite trainable. Use a reward based positive training method avoid harsh tones or punishments. Stay firm so you are clear as the leader of the pack and be consistent. Early training and socialization are a very important responsibility of any dog owner to ensure their dog undertakes them.

Living with a Mastador

How much grooming is needed?

She is a fairly easy dog to look after when it comes to grooming, she sheds anything from a low to moderate amount and that may need some vacuuming up after. Regular brushing of her coat will get rid of any loose hair and keep it shiny and healthy looking. Bathe her just when she really needs it. Her size makes bath times a tricky time. If you do not have an easy way of doing it at home take her to a groomers that has a bath area for pet owners to use. She can also have her nails clipped then if they are too long. Other needs are checking her ears once a week for infection and wiping them clean, and brushing her teeth at least three times a week.

What is she like with children and other animals?

She is a great dog with children, especially with early socialization and when the children have been taught how to play nicely with her. She is affectionate towards them, can be gentle and loves to play with them. Smaller children may need supervision just because of her size as accidents like knocking them down can happen. She is also usually good with other animals and dogs.

General information

She is alert and will bark to alert you of any intruders, otherwise her barking is rare. If she is left alone for a long time barking may be a part of her way of showing she is not happy. She will need at least 4 1/2 to 6 cups of high quality dry dog food a day. Perhaps more. It should be split into at least two meals a day to avoid triggering bloat. She also needs her food and treats monitored along with her physical activity as she has a very high tendency to become obese.

Health Concerns

Any puppy has the chance of inheriting health issues or potential issues from their parents. For the Mastador those include OCD, eye problems, epilepsy, heart problems, bloat, seizures, kidney problems, cancer, Joint dysplasia, skin problems, cold tail and ear infections. Buying from good breeders and asking to see health clearances is a good way to lower those risks.

Costs involved in owning a Mastador

A Mastador puppy can cost between $900 to $2000 at the moment, prices can change depending on location, type of breeder, age of puppy, health of puppy and how fashionable that mixed breed is at the time. If not included with the price you will also at the time of purchase have to have the puppy spayed, chipped, blood tested, vaccinated and buy a collar, leash, crate and bowls for her. This could all cost another $450 to $500. Yearly medical costs for just the basics such as check ups, shots, flea prevention and pet health insurance come to between $485 to $600. Non-medical yearly costs for essentials like treats, food, toys, license and training come to $510 to $650.


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The Mastador is a great family dog but you will need to have room for her. While she will not need hours a day of exercise she will need a fair amount and regularly too so she needs an owner willing to be active with her. She will soon become an important part of the family and she will be dedicated to you, protective of you and will love you as much you will love her.

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Featured Image Credit: Corrie Mick, Shutterstock

Nicole Cosgrove

Nicole is the proud mom of Baby, a Burmese cat and Rosa, a New Zealand Huntaway. A Canadian expat, Nicole now lives on a lush forest property with her Kiwi husband in New Zealand. She has a strong love for all animals of all shapes and sizes (and particularly loves a good interspecies friendship) and wants to share her animal knowledge and other experts' knowledge with pet lovers across the globe.