Mastiff feeding chart
Working Group · Giant breed
How much to feed a Mastiff, based on the NRC 2006 energy model and this breed's typical weight range — not a single manufacturer's generic chart.
Feeding notes for Mastiffs
- One of the largest AKC breeds — giant-breed growth must be paced carefully, since excess calories during the growth phase are strongly linked to orthopedic disease in giant breeds.
- Deep-chested and prone to bloat/GDV — multiple smaller meals and a calm post-meal routine are standard advice for this breed.
Calculate this breed's daily feeding amount
Mastiff feeding calculator
Every complete dog food sold in the US must list this under the AAFCO calorie content statement on the bag or can — usually as kcal/cup or kcal/kg.
More Working Group breeds
Frequently asked questions
How much should I feed a Mastiff?
A Mastiff at its typical adult weight of about 175 lb (79.4 kg) has a resting energy need of roughly 1,862 kcal/day before any activity multiplier. Use the calculator above with your dog's actual weight, life stage, and your food's own calorie density for an exact daily amount.
What is the typical adult weight of a Mastiff?
Mastiffs typically reach an adult weight of 120–230 lb (54.4–104.3 kg), though individual dogs vary with sex, line, and body condition.
When does a Mastiff stop growing?
As a giant-sized breed, a Mastiff typically reaches its adult weight by around 20 months old, though full skeletal and muscular maturity isn't complete until roughly 24 months.
How many meals a day should a Mastiff puppy eat?
Puppies under 4 months generally do best with 4 meals a day, tapering to 3 meals from 4 months until they approach adult size, then settling into 2 meals a day as adults — use the life-stage selector in the calculator above to switch between these.