Greyhound vs Mastiff

Which dog breed is right for you?

Greyhound

Size
60–70 lbs, 27–30 in
Lifespan
10–14 years
Exercise
Moderate
Grooming
Low
Good with Kids
Yes
Good with Pets
Yes
Gentle Quiet Noble Independent

Mastiff

Size
120–230 lbs, 28–36 in
Lifespan
6–10 years
Exercise
Low
Grooming
Low
Good with Kids
Yes
Good with Pets
Yes
Gentle Dignified Brave Patient

About the Greyhound

The Greyhound is one of the most ancient breeds — depicted in Egyptian tomb art dating back 5,000 years and prized by nobility throughout history for their unmatched speed and grace. Standing 27–30 inches tall and weighing 60–70 pounds, these aerodynamic athletes can reach speeds of 45 miles per hour, making them the fastest dog breed in the world. Their short, smooth coat comes in virtually every color and pattern, including black, white, fawn, red, blue, brindle, and various combinations.

Temperament & Personality

Greyhounds are gentle, quiet, and surprisingly lazy — the ultimate couch potatoes who happen to be world-class sprinters. They are sweet-natured and sensitive dogs that form deep bonds with their owners and are typically good with older children who respect their space. Many retired racing Greyhounds adapt beautifully to home life, though they may need time to learn household basics like stairs, glass doors, and slippery floors.

Pros

  • Remarkably calm and quiet indoors — content to sleep 18+ hours a day on the couch
  • Low-maintenance coat — virtually no grooming needs and minimal shedding
  • Gentle, non-aggressive temperament — rarely bark and never show hostility toward people
  • Many retired racers are available for adoption — giving these athletes a well-deserved second career

Cons

  • Strong prey drive — cannot be trusted off-leash and may chase small dogs, cats, and wildlife
  • Thin skin and minimal body fat make them susceptible to cuts, cold temperatures, and pressure sores
  • Sensitive to anesthesia and many common medications due to low body fat percentage
  • Prone to osteosarcoma, bloat, and dental disease — especially in retired racing dogs

Give a graceful Greyhound the retirement they deserve — browse adoptable Greyhounds on Puplister.

About the Mastiff

The English Mastiff is one of the most ancient and massive dog breeds, with roots tracing back over 2,000 years to ancient Britain and possibly earlier Molosser-type dogs of Asia. Males commonly weigh 160 to 230 pounds and stand 30 inches or taller at the shoulder, making them among the heaviest domestic dogs in the world. Their short, dense double coat comes in fawn, apricot, or brindle — always with a distinctive dark mask on the face.

Temperament & Personality

Despite their imposing size, Mastiffs are famously gentle, calm, and deeply loyal — often called "gentle giants" with good reason. They are patient and protective with children in their family, though their sheer mass means supervision around small kids is wise. Mastiffs tend to be reserved with strangers but rarely aggressive, preferring to position themselves between their family and any perceived threat.

Pros

  • Naturally protective without needing guard training
  • Surprisingly low energy indoors — content to lounge for hours
  • Gentle and patient temperament ideal for families
  • Short coat requires only basic weekly brushing

Cons

  • Massive food bills — adult Mastiffs eat 6 to 10 cups of food daily
  • Shorter lifespan of 6 to 10 years typical of giant breeds
  • Prone to hip dysplasia, bloat (gastric torsion), and heart conditions
  • Excessive drooling is a constant reality with this breed

Ready to welcome a magnificent gentle giant into your home? Explore Mastiff adoption opportunities on Puplister.

Available for Adoption

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Frequently Asked Questions

What is the difference between a Greyhound and a Mastiff?
The Greyhound is 60–70 lbs, 27–30 in sized while the Mastiff is 120–230 lbs, 28–36 in sized. They differ in size (60–70 lbs, 27–30 in vs 120–230 lbs, 28–36 in), lifespan (10–14 years vs 6–10 years), and care requirements.
Which breed is better with kids, Greyhound or Mastiff?
Greyhound is generally good with kids. Mastiff is generally good with kids.
Which breed lives longer, Greyhound or Mastiff?
The Greyhound has a lifespan of 10–14 years while the Mastiff has a lifespan of 6–10 years.

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