How many calories does a neutered adult Pyrenean Mastiff need?

At 155 lb, the verified feeding table lists 2719 kcal per day for a Pyrenean Mastiff (resting energy 1699 kcal times a factor of 1.6).

How many calories does an intact adult Pyrenean Mastiff need?

At 155 lb, the verified feeding table lists 3059 kcal per day for a Pyrenean Mastiff (resting energy 1699 kcal times a factor of 1.8).

How many calories does a Pyrenean Mastiff puppy under 4 months need?

At 155 lb, the verified feeding table lists 5098 kcal per day for a Pyrenean Mastiff (resting energy 1699 kcal times a factor of 3).

How many calories does the weight-loss row list for a Pyrenean Mastiff?

At 155 lb, the verified feeding table lists 1699 kcal per day for a Pyrenean Mastiff (resting energy 1699 kcal times a factor of 1).

Feeding calculator

How much to feed a Pyrenean Mastiff

A 155 lb Pyrenean Mastiff is the starting weight on this calculator, taken from the verified adult range (120–190 lb).

Last reviewed November 1, 2026.

Daily portion

Dog food calculator: 2447 kcal; 6.99 cups · 839 g · 2 meals
Merck chart, Adult, neutered: 2720 kcal; Resting energy 1700 kcal × 1.6, before the calculator's activity and size adjustment.

Lifespan10–12 years

Weight120–190 lb

SizeGiant GroupMiscellaneous Class

Resting energy at that weight is about 1700 kcal per day. The Merck neutered-adult factor of 1.6 puts maintenance near 2720 kcal before activity is added. The dog food calculator on this page uses that same resting-energy formula, then applies the activity and size adjustments from the main dog food calculator.

Reading the portions

Compared with other single-size giant breeds, that neutered-adult portion is 531 kcal higher than the 2189 kcal for an average giant breed at 116 lb.

Portions are a starting estimate. Pyrenean Mastiff individuals can vary by body condition, neuter status, and how much they work. Adjust the bowl from what you see on the ribs, not from the table alone.

Feeding table from the verified weight chart

RER=70*kg^0.75; MER=RER*factor. Starting estimate only; individuals vary up to 50%; adjust by body condition

Pyrenean Mastiff adults maintenance energy

Swipe sideways to read every column.

Weight	RER	Adult, neutered	Adult, intact	Puppy under 4 months	Puppy 4 months and older	Weight loss
119.9 lb (54.4 kg)	1402 kcal	2243 kcal	2524 kcal	4206 kcal	2804 kcal	1402 kcal
137.6 lb (62.4 kg)	1554 kcal	2487 kcal	2797 kcal	4662 kcal	3108 kcal	1554 kcal
155 lb (70.3 kg)Current weight	1699 kcal	2719 kcal	3059 kcal	5098 kcal	3399 kcal	1699 kcal
172.4 lb (78.2 kg)	1841 kcal	2945 kcal	3313 kcal	5522 kcal	3682 kcal	1841 kcal
190 lb (86.2 kg)	1980 kcal	3168 kcal	3565 kcal	5941 kcal	3961 kcal	1980 kcal