Mastiff
Dogs

Mastiff

4.4
8 reviews
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The Mastiff is one of the heaviest dog breeds in the world, with males regularly exceeding two hundred pounds. Despite their formidable size, Mastiffs are gentle, good-natured, and dignified companions who are devoted to their families. They require relatively moderate exercise for their size but need early socialization to manage their natural protective instincts.

Pros

  • Gentle, patient, and devoted to family
  • Naturally protective without excessive aggression
  • Calm and relatively low energy indoors
  • Loyal and deeply bonded to their people

Cons

  • Heavy drooling from most individuals
  • Short lifespan of 6-10 years
  • Expensive to feed, house, and treat medically
  • Prone to bloat, joint problems, and heart conditions

Reviews 8

Q
QuietBound28
5/5

Gentle giant with my children

My children were four and six when we got our Mastiff puppy. He is now three and bigger than both of them. He has been gentle, patient, and protective of them from the beginning. He lies down when they approach to bring himself to their level. He lets them climb on him. He watches over them in the g…

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C
CleverMuzzle58
4/5

Noble guardian and family dog

My Mastiff is both the most imposing and the most gentle dog I have ever owned. He is calm and quiet in the house, excellent with my children, and completely unflappable in any situation. His size alone deters any unwanted attention and he has never needed to be more than present to communicate his …

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T
TenderBark29
5/5

Best family protector

We live rurally and my Mastiff has been the most reassuring presence our family could have. He patrols the property each evening, acknowledges familiar faces, and treats unknown visitors to a measured but unmistakable inspection. He has never been aggressive but no one who meets him has any doubt ab…

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G
GoldenClaw60
5/5

Every year is precious

Knowing that large breeds live shorter lives made me intentional about my time with my Mastiff from day one. He is six now and healthy but I am aware the clock moves differently for big dogs. We have adventures, slow mornings, long cuddles, and I photograph him constantly. He has been the most magni…

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B
BoldTrot92
4/5

Surprisingly trainable

My Mastiff took to training faster than I expected. He is motivated by praise and a calm, consistent approach gets excellent results. His size means teaching loose-leash walking was a genuine priority and he responded well to it. He now walks beautifully beside me which is essential when you are man…

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J
JollyWag59
3/5

Beautiful breed, difficult practicalities

I love my Mastiff profoundly but I want honest information available. He eats twelve cups of food a day. His vet visits are expensive because everything is dosed by weight. He drools on my ceiling somehow. He needs a large vehicle and special pet insurance. He is not suitable for a small home. If yo…

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G
GoldenTail71
5/5

Two hundred pounds of pure love

My Mastiff weighs two hundred and fifteen pounds and his only ambition is to sleep as close to me as physically possible. He somehow fits himself entirely onto the sofa and stares reproachfully when I suggest he move. He is gentle with my children, tolerant of the cat, and completely devoted to our …

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V
VividNuzzle11
4/5

Calm and compatible with other pets

My Mastiff lives with two cats and an elderly small dog and the coexistence is peaceful. He approaches the cats with slow, careful movements and they have gradually accepted him. He is gentle with the small dog and seems to understand the size difference. He has never showed predatory behaviour towa…

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