Bullmastiff Feeding Guide
How much to feed your Bullmastiff — daily calories, portion sizes, and feeding schedule
The Bullmastiff, a giant breed hailing from England, sits at #101 on the AKC popularity chart. Created in 19th-century England by gamekeepers who crossed Bulldogs with Mastiffs to produce a dog that could catch and hold poachers without mauling them. Bred for physically demanding tasks like guarding, hauling, and rescue, the Bullmastiff is a powerful giant breed from the Working Group. Fueling their muscular frame requires attention to protein quality, calorie density, and joint-supporting nutrients. An adult Bullmastiff needs between 1652 and 2011 calories per day, though this varies with age, weight, activity level, and individual metabolism.
Plan on 1.5–2.6 cups of premium dry food daily for your adult Bullmastiff, divided into morning and evening meals. Given this working breed's predisposition to Lymphoma, discuss dietary approaches that may help manage this risk with your vet. Males weigh 110-130 pounds, females 100-120 pounds; the breed should be powerfully built but not excessively heavy or lacking in agility..
Daily Calorie Needs for Bullmastiff
Adult
1652-2011
kcal/day
Puppy (peak)
2080
kcal/day (6-9 mo)
Senior
1468-1787
kcal/day
Note: Feeding guidelines are estimates based on standard veterinary formulas. Every dog is different — consult your veterinarian for personalized advice.
Feeding Strategy for Bullmastiffs
With a calm, low-energy temperament, the Bullmastiff is particularly susceptible to overfeeding. Their daily requirement of 4.3-5.3 cups may seem surprisingly small, but exceeding it regularly leads to weight gain. A weight-management or light formula can help, and measuring every meal with a proper cup — not estimating — is essential for this breed.
Bloat Prevention for Bullmastiffs
Bullmastiffs are predisposed to Gastric Dilatation-Volvulus (commonly known as bloat), one of the most serious emergencies in veterinary medicine. The stomach fills with gas and can twist on itself, cutting off blood supply. How you feed your Bullmastiff directly impacts this risk. Deep-chested breeds like the Bullmastiff are anatomically more susceptible, but proper feeding practices significantly reduce the odds.
Essential Feeding Practices
- Divide daily food into 2-3 smaller meals instead of one large feeding
- Use a slow-feeder bowl to prevent gulping air while eating
- Avoid vigorous exercise for at least 30-60 minutes before and after meals
- Keep your dog calm during and after mealtimes — excitement increases air swallowing
- Consider moistening kibble with warm water to reduce expansion in the stomach
- Feed from a raised bowl at chest height to reduce neck strain and air intake
Bullmastiff Feeding Schedule
Morning (7-8 AM)
2.2-2.7 cups kibble
Evening (5-6 PM)
2.2-2.7 cups kibble
Split Meals
Portion Sizes by Food Type
Daily Portions for Bullmastiff
Based on average adult weight and activity level
| Food Type | Daily Amount | Calories | Frequency | Notes |
|---|---|---|---|---|
| Dry Kibble | 4.3-5.3 cups | 1652-2011 kcal | 2 meals/day | ~380 kcal per cup |
| Wet Food | 6.6-8 cans | 1652-2011 kcal | 2 meals/day | ~250 kcal per 13oz can |
| Raw Diet | 32-62 oz | 1652-2011 kcal | 2 meals/day | 2-3% of body weight |
- Amount
- 4.3-5.3 cups
- Calories
- 1652-2011 kcal
- Frequency
- 2 meals/day
~380 kcal per cup
- Amount
- 6.6-8 cans
- Calories
- 1652-2011 kcal
- Frequency
- 2 meals/day
~250 kcal per 13oz can
- Amount
- 32-62 oz
- Calories
- 1652-2011 kcal
- Frequency
- 2 meals/day
2-3% of body weight
Exercise & Feeding for Bullmastiffs
The Bullmastiff has modest exercise needs — 20-30 minutes of gentle walks and indoor play daily is usually sufficient. Because of their low activity level, there is rarely a need to adjust food intake for exercise. The bigger risk is overfeeding a relatively sedentary dog. If your Bullmastiff gets less activity than usual (bad weather, recovery from illness), consider reducing portions by 10%.
Joint Health & Nutrition
Joint health is a primary nutritional concern for Bullmastiffs, which are predisposed to Hip Dysplasia and Elbow Dysplasia. Diet plays a preventive and management role at every life stage. For puppies, controlled growth rate and proper calcium-phosphorus ratios protect developing joints. For adults, maintaining ideal body weight reduces mechanical stress on joints. Specific nutrients can slow cartilage degradation and reduce inflammation.
Recommended Joint Supplements
Common Feeding Mistakes to Avoid
Overfeeding because the Bullmastiff always seems hungry
Some breeds appear perpetually hungry due to genetics or behavior. Stick to measured portions and use low-calorie treats like baby carrots, green beans, or ice cubes. If your Bullmastiff inhales food, try a slow-feeder bowl.
Using a puppy formula designed for small breeds
Large and giant breed puppies need controlled calcium and phosphorus levels to prevent developmental orthopedic diseases. Always choose a large-breed puppy formula that supports slow, steady growth rather than rapid weight gain.
Feeding one large meal per day
Bullmastiffs are at risk for bloat (gastric dilatation-volvulus), a life-threatening emergency. Always split daily food into 2-3 smaller meals and avoid exercise immediately after eating. Consider an elevated bowl and a slow-feeder.
Skipping joint supplements until problems appear
For breeds predisposed to joint issues, preventive supplementation with glucosamine and omega-3 fatty acids can help protect cartilage before damage occurs. Starting these supplements early — even at 1-2 years old — is more effective than waiting for symptoms.
Letting the puppy grow as fast as possible
Giant breed puppies that grow too quickly are at higher risk for developmental bone and joint disorders. Feed a giant-breed puppy formula and aim for slow, steady growth — reaching full adult size at 18-24 months is healthier than hitting target weight at 12 months.
Bullmastiff-Specific Feeding Tips
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Tip 2
Tip 3
Tip 4
Tip 5
Tip 6
Breed-Specific Nutritional Needs
Based on health conditions common in Bullmastiffs, consider these nutritional adjustments:
Glucosamine & Chondroitin
Add a joint supplement with glucosamine (500-1000mg) and chondroitin. Consider foods with added omega-3 fatty acids (EPA/DHA) to reduce inflammation.
Meal Frequency
Feed 2-3 smaller meals per day instead of one large meal. Use a slow-feeder bowl. Avoid exercise 30 minutes before and after meals.
Bullmastiff Ideal Weight
Is your Bullmastiff at a healthy weight? The ideal range is 100–130 lbs (males 100–130, females 85–114). Check these three signs: Ribs: Easily felt with light pressure; not visible but not buried under fat. Waistline: A clear narrowing behind the ribs when viewed from above.
Male Bullmastiff
100-130 lbs
45-59 kg
Female Bullmastiff
85-114 lbs
39-52 kg
Related Guides
Feeding Guides for Similar Breeds
Frequently Asked Questions
Feeding Guidelines Disclaimer
The feeding recommendations on DosageGuide.com are estimates based on standard veterinary nutrition formulas (RER = 70 × weight^0.75) and general guidelines from AAFCO and veterinary nutrition resources.
Every dog is unique. Actual calorie needs vary based on breed, metabolism, activity level, health conditions, spay/neuter status, and the specific food brand you use. Always consult your veterinarian for personalized feeding advice.
These guides are for general reference and do not replace professional veterinary guidance. Adjust portions based on your dog's body condition score and weight trends.