American Mastiff
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You are here: Dogs > Dog Breeds > American Mastiff

American Mastiff Information

  • American Mastiff Training
  • | Temperament
  • | Health
  • | Origin
  • | Maintenance
  • | Ideal Environment
  • | Photos

American Mastiff

Thank you for using our site to find American Mastiff information. Feel free to add any information about the American Mastiff breed we may have missed. If you have any specific questions about the American Mastiff, feel free to ask them below. We've found that most breeders are more than happy to reply and answer your questions. We love your photos and reviews! We appreciate all additions to the site and we know our users value them as well. If you need help training your American Mastiff check out our dog training reviews.
American Mastiff

General Description

The American Mastiff is a large, powerful dog with a wide, heavy, rectangular-shaped head and a powerfully muscular build. The breed has a deep, rounded chest and well-sprung ribs. Their limbs are well-built, straight, and well-muscled, and their burly necks are thick and slightly arched. American Mastiffs have a long tail that reaches the hocks, and a pair of high set ears that are semi-round in shape. Their medium-sized muzzle is well-proportioned and features a black nose. American Mastiffs have teeth that close in a scissors bite and dark, amber-colored eyes. American Mastiff puppies are born darkly colored, and as they get older they become lighter. The breed’s coat can vary slightly in color, but is usually a light fawn that may or may not have some white markings.
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This breed also comes in a blonde brindle coloring with a black mask.

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Character

American Mastiffs make excellent family pets as they are terrific with children and hopelessly devoted to their owners. They are dignified, mellow, calm, and quiet. While American Mastiffs are very protective, they are never aggressive. Rather, they make excellent watch dogs and only attack if their families (especially children) are in danger. American Mastiffs are social, wise, and gentle with people, and they are very patient with small children and other animals.

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Size

28 – 35 inches

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Weight

140 – 200 pounds

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General Health

American Mastiffs typically live for 10 to 12 years.
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American Mastiffs do well in an apartment setting with daily exercise. As they grow older and tend to become a little lazy, a daily walk will do, or a run in a fenced in yard. They are relatively inactive indoors.

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History

The American Mastiff was developed by Fredericka Wagner. She constructed the breed in Piketon, OH after crossing an English Mastiff with a dog thought to be an Anatolian Mastiff or Anatolian Shepherd. After much selective breeding, Fredericka Wagner was able to create Mastiff puppies with a tight lower lip line and a dry mouth.

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Maintenance

American Mastiffs have a short-haired coat that is comparatively easy to take care of. They require regular brushing and their coat can be wiped down with a cloth for a glossy sheen. They require baths and dry shampoos only as necessary. American Mastiffs are average shedders.

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Ideal Environment

The American Mastiff can do acceptably in a small household or apartment if he is sufficiently exercised. They are comparatively inactive indoors, so their ideal living conditions would consist of at least a small yard. The American Mastiff has a propensity to become lazy, but they will have a better quality of life if exercise is initiated.
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The American Mastiff is a dog that needs a job and daily exercise. Mastiffs also need rules, guidance and demand respect. With these applied you will have a great dog. If not, you may experience trouble.

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Dog Training!

If you're having problems training your dog or getting control, you should read our review of DogProblems.com. Adam will do whatever it takes to help you whip your dog into shape. I've used them to help with my Great Dane as well as help friends train their dogs. It's the first place I go to help answer users Questions. Many training issues are too extensive to answer in this forum, which is why I refer a lot of the load to his site.

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Discuss the American Mastiff breed on our Forum!

Ask a QuestionAmerican Mastiff Q&A

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I am looking to adopt an AM in 2008.  I had a St. Bernard for 9.5 years - he was an energetic puppy but was not the type to chew on furniture, etc. What is the energy level of a properly exercised AM?
American Mastiff puppies have the energy level of any puppy.  As adults, American Mastiffs, like their English Mastiff cousins, can turn into couch potatoes if you let them.  They don't require a lot of exercise, but a nice walk is always enjoyed.  My American Mastiff loves to chase a Frisbee or his Jolly Ball thrown across the yard. Wishing you the best with your future American Mastiff!  They're awesome dogs!
Ours runs around a bit. like any puppy.  Minimum chewing of kids toys or furniture... and she has almost grown out of it at 13 weeks.
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I am looking into getting a AM but have never owned one. I worked at Boxer breeding kennel for a number of years so being around dogs is not an issue. But I'm not very sure as to where I can find a AM breeder. I dont want one for show, just a pet/member of the family. And roughly what kind of prices will I be looking at for buying the dog, and roughly how much food they eat?
We got our puppy from Frederica at Flying W Farm, great breeder.  Pricing just changed, have a look at their site.  Our 12 week old female puppy eats about 6-7 cups of quality dried food and a chicken leg every day.
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We have a 11 week old AM.  We know that obedience training is important but would like to know at what age ( or problems exhibited) to start this training?
We are starting ours at 12 weeks, right after the last puppy shot.
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We have a 1 year old male American Mastiff named Leo. Think we need to change dog food-possible allergy to the current food. What is the most recomended dog food(besides home made) to give AM's? (note-he eats about 5-6 cups per day)
You'd want any high quality, low protein and fat food. My first was a fan of Iam's, but there's also a fantastic option made through a breeder in Southern California that will ship it out, and it's been adding years to the lives of giant dogs. They even have a picture of a sixteen year old Great Dane. I think it's called gentle giants.
I feel the best food will be royal canin if u can afford it. Its costly but it is the best because its made from the best items available.
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Upload a PhotoAmerican Mastiff Photos

American Mastiff, 3 years, FawnAmerican Mastiff, 2 years, FawnAmerican Mastiff, 2 years, FawnAmerican Mastiff, 2 years, FawnAmerican Mastiff, 1 year, FawnAmerican Mastiff, 1 year, FawnAmerican Mastiff, 2 years, BrindleAmerican Mastiff, 2 years, BrindleAmerican Mastiff, 2 years, BrindleAmerican Mastiff, 2 years, BrindleAmerican Mastiff, 2 years, BrindleAmerican Mastiff, 2 years, Brindle and Fawn
American Mastiff, 9 weeks, brindleAmerican Mastiff, 4 months, BrownAmerican Mastiff, 8 months, BrownAmerican Mastiff, 2 years, HarliquinAmerican Mastiff, 8 month, brownAmerican Mastiff, 8 months, brownAmerican Mastiff, 3.5 months, FawnAmerican Mastiff, 6.5 months, FawnAmerican Mastiff, 9.5 months, 135 lbs., FawnAmerican Mastiff, 9 months, Dark FawnAmerican Mastiff, 1 year, FawnAmerican Mastiff, 7  mon., Fawn
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Write a ReviewAmerican Mastiff Reviews

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My review of American Mastiffs

I own a 3-year-old American Mastiff named Murphy. Murphy is the most awesome dog I've ever known! He is extremely smart, loving, sweet, gentle, patient and loyal. He is a favorite everywhere we go. He has never met anyone (2- or 4-legged) that he didn't love! He was awarded the CGC (Canine Good Citizenhip Award) and is an actively working Certified Therapy Dog. NOTE: Genuine American Mastiffs can ONLY be obtained from the 12 approved AM breeders, who are members of the AMBC (American Mastiff Breeders Council).Michelle ParlierMcHenry, Illinois

Pros: On average, they drool much less than their English Mastiff cousins. Less incidence of health problems. Longer life-span. Wonderful temperament (which is guaranteed for life). Don't require a lot of grooming.

Cons: Big dogs equal big food bills and higher costs for vaccinations, etc.

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American Mastiff Information

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