Mastiff
MASS-tiff
Good-natured, Dignified, Courageous, Calm. Originally bred for guarding estates; historically used in war and bull-baiting.
An adult Mastiff weighs 160-230 lbs (male) or 120-170 lbs (female), needs 1,400-3,200 calories daily, and lives 6-10 yrs. Giant breeds grow slowly and need careful nutrition management during their extended puppyhood. The breed's primary health watch is hip dysplasia. All numbers below come from AKC breed standards and NRC 2006 veterinary nutrition formulas.
Nutrition and feeding
A typical adult Mastiff needs 1,400 to 3,200 calories per day. An average male (195 lbs / 88.5 kg) needs around 2,420 kcal; a female (145 lbs / 65.8 kg) roughly 1,940 kcal. These estimates use the vet-standard RER/MER formula.
Estimate for a typical adult Mastiff. For puppies, seniors, or specific activity levels, use the full calorie calculator.
Health profile
Giant breeds have shorter lifespans than smaller dogs, and the Mastiff is no exception at 6-10 yrs. Their large frames put stress on joints, hearts, and skeletal systems. The breed's primary health concerns are hip dysplasia and elbow dysplasia, which responsible breeders screen for before breeding.
Exercise and activity
Low; short, moderate walks. Mastiffs are not active dogs. Avoid intense exercise, especially in puppies under 2 years. Their massive size puts enormous stress on joints. Working breeds like the Mastiff were developed for specific physical tasks. They need purposeful activity, not just wandering around a yard. Structured exercise with clear tasks, such as carrying a dog pack on hikes, pulling a cart, or advanced obedience training, satisfies their need to work.
Care and traits
Mastiffs have a short, close-lying, double coat coat. Origin: England.
One of the oldest and heaviest dog breeds. A male Mastiff can exceed 230 lbs. Despite their imposing size, they're gentle and patient. They drool significantly. Puppies grow rapidly; a Mastiff puppy can gain 5+ lbs per week. Short lifespan is the breed's biggest heartbreak.
Grooming needs are minimal. A weekly brushing to remove loose hair and distribute skin oils is sufficient for most Mastiffs. Bathing is only needed when the dog is noticeably dirty or smelly.
Living space matters for a breed this size. They need room to move without knocking things over, and many giant breeds prefer cool environments. Heat tolerance is limited; monitor closely in warm weather. Elevated food and water bowls may improve comfort during meals.
Tools for Mastiff owners
Frequently asked questions
Daily calorie needs for a Mastiff range from 1400 to 3200 kcal. A 195-pound individual falls near the middle of that range. Elevated food bowls are sometimes recommended for giant breeds, though research on bloat prevention is mixed. Slow-feeder bowls are a safer bet. Active dogs need more; seniors and less active individuals need less. Use our calorie calculator with your dog's actual weight for a personalized number.
Males typically weigh 160-230 lbs (72.6–104.3 kg). Females run lighter at 120-170 lbs (54.4–77.1 kg). Giant breeds should appear muscular and solid but never round. Because they carry so much mass, even moderate overweight significantly stresses joints and shortens lifespan. Check body condition by feeling the ribs (they should be easy to find), viewing from above (waist should narrow behind the ribs), and from the side (abdomen should tuck up behind the ribcage).
Among Mastiffs, hip dysplasia is the condition most frequently diagnosed. Hip dysplasia is a developmental condition where the hip joint doesn't fit together properly. Screening through OFA or PennHIP before breeding is standard practice. In pet dogs, maintaining a lean body weight is the most effective way to manage and slow progression. Other conditions seen in the breed include elbow dysplasia, bloat, osteosarcoma. Regular vet visits with breed-specific screening catch problems when they are most treatable.
Plan for 20 to 30 minutes of exercise daily for your Mastiff. Good activities for this breed include structured tasks, cart pulling, obedience drills. Avoid high-impact exercise (jumping, stairs) during the growth phase to protect developing joints. Even low-energy breeds need daily movement for joint health, weight management, and mental well-being.
Disclaimer: General breed information based on AKC standards and veterinary sources. Individual dogs vary. Calorie estimates use the RER/MER formula (NRC 2006). Consult your veterinarian for advice specific to your dog. See our sources.
Last reviewed: April 1, 2026