How Much Should a Mastiff Eat?
Typical adult weight: 120-230 lb (giant breed). Adjust the weight below to match your dog.
Check the calories per cup on your dog food's bag and enter it above; brands vary a lot (about 300-450 kcal per cup for dry food).
A neutered adult Mastiff weighing 120-230 lb needs roughly 2240-3660 calories a day, about 6.5-10.5 cups of a typical 350 kcal/cup dry food.
Breed note: A giant breed that eats a lot in absolute terms. Ask your vet about large-breed puppy food and bloat risk.
Feeding a Mastiff puppy or adult
Giant breeds can keep growing until 18 to 24 months. Puppies need a large- or giant-breed puppy food and should be kept lean, because growing too fast can stress developing joints. Feeding two or more smaller meals a day instead of one large one is commonly advised; ask your vet about bloat risk.
Mastiff feeding FAQ
How much should a Mastiff eat per day?
A neutered adult Mastiff weighing 120-230 lb needs roughly 2240-3660 calories a day, about 6.5-10.5 cups of a typical 350 kcal/cup dry food. The exact amount depends on your dog's weight, age, activity and the calories in the food.
How much should an active Mastiff eat?
An active or working Mastiff may need about 2810-4570 calories a day, or 8-13 cups at 350 kcal/cup.
How much should a senior or low-activity Mastiff eat?
A senior or low-activity Mastiff may need about 1960-3200 calories a day, or 5.5-9.25 cups at 350 kcal/cup.
Related guides
- How to Read a Dog Food Label (and Find Calories Per Cup)
- Is My Dog a Healthy Weight? How to Check at Home
- Puppy Feeding Guide: How Much and How Often
- How to Switch Dog Food Without Upsetting Their Stomach
- How Many Calories Does My Dog Need Each Day?
- Dog Treats and Calories: The 10 Percent Rule
- Feeding a Senior Dog: What Changes With Age