How many calories does a neutered adult Irish Terrier need?

At 26 lb, the verified feeding table lists 713 kcal per day for a Irish Terrier (resting energy 446 kcal times a factor of 1.6).

How many calories does an intact adult Irish Terrier need?

At 26 lb, the verified feeding table lists 802 kcal per day for a Irish Terrier (resting energy 446 kcal times a factor of 1.8).

How many calories does a Irish Terrier puppy under 4 months need?

At 26 lb, the verified feeding table lists 1337 kcal per day for a Irish Terrier (resting energy 446 kcal times a factor of 3).

How many calories does the weight-loss row list for a Irish Terrier?

At 26 lb, the verified feeding table lists 446 kcal per day for a Irish Terrier (resting energy 446 kcal times a factor of 1).

Feeding calculator

How much to feed a Irish Terrier

A 26 lb Irish Terrier is the starting weight on this calculator, taken from the verified adult range (27 lb (male), 25 lb (female)).

Last reviewed November 1, 2026.

Irish Terrier dog — Photo: Ron Armstrong from Helena, MT, USA · CC BY 2.0 · Wikimedia Commons

Daily portion

Dog food calculator: 713 kcal; 2.04 cups · 244 g · 2 meals
Merck chart, Adult, neutered: 712 kcal; Resting energy 445 kcal × 1.6, before the calculator's activity and size adjustment.

Lifespan13–15 years

Weight27 lb (male), 25 lb (female)

SizeMedium GroupTerrier Group

Resting energy at that weight is about 445 kcal per day. The Merck neutered-adult factor of 1.6 puts maintenance near 712 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 medium breeds, that neutered-adult portion is 162 kcal lower than the 874 kcal for an average medium breed at 34.1 lb.

Portions are a starting estimate. Irish Terrier 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

Irish Terrier 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
24.9 lb (11.3 kg)	431 kcal	690 kcal	777 kcal	1294 kcal	863 kcal	431 kcal
25.4 lb (11.5 kg)	437 kcal	699 kcal	787 kcal	1311 kcal	874 kcal	437 kcal
26 lb (11.8 kg)Current weight	446 kcal	713 kcal	802 kcal	1337 kcal	891 kcal	446 kcal
26.5 lb (12 kg)	451 kcal	722 kcal	812 kcal	1354 kcal	903 kcal	451 kcal
26.9 lb (12.2 kg)	457 kcal	731 kcal	823 kcal	1371 kcal	914 kcal	457 kcal