How many calories does a neutered adult Sealyham Terrier need?

At 18.7 lb, the verified feeding table lists 558 kcal per day for a Sealyham Terrier (resting energy 348 kcal times a factor of 1.6).

How many calories does an intact adult Sealyham Terrier need?

At 18.7 lb, the verified feeding table lists 627 kcal per day for a Sealyham Terrier (resting energy 348 kcal times a factor of 1.8).

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

At 18.7 lb, the verified feeding table lists 1045 kcal per day for a Sealyham Terrier (resting energy 348 kcal times a factor of 3).

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

At 18.7 lb, the verified feeding table lists 348 kcal per day for a Sealyham Terrier (resting energy 348 kcal times a factor of 1).

Feeding calculator

How much to feed a Sealyham Terrier

A 18.7 lb Sealyham Terrier is the starting weight on this calculator, taken from the verified adult range (19.8 lb (male), 17.6 lb (female)).

Last reviewed November 1, 2026.

Sealyham Terrier dog — Photo: Pleple2000 · CC BY-SA 3.0 · Wikimedia Commons

Daily portion

Dog food calculator: 585 kcal; 1.67 cups · 201 g · 2 meals
Merck chart, Adult, neutered: 557 kcal; Resting energy 348 kcal × 1.6, before the calculator's activity and size adjustment.

Lifespan12–14 years

Weight19.8 lb (male), 17.6 lb (female)

SizeSmall GroupTerrier Group

Resting energy at that weight is about 348 kcal per day. The Merck neutered-adult factor of 1.6 puts maintenance near 557 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 small breeds, that neutered-adult portion is 63 kcal higher than the 494 kcal for an average small breed at 16 lb.

Portions are a starting estimate. Sealyham 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

Sealyham 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
17.6 lb (8 kg)	333 kcal	533 kcal	599 kcal	999 kcal	666 kcal	333 kcal
18.1 lb (8.2 kg)	339 kcal	543 kcal	611 kcal	1018 kcal	678 kcal	339 kcal
18.7 lb (8.5 kg)Current weight	348 kcal	558 kcal	627 kcal	1045 kcal	697 kcal	348 kcal
19.2 lb (8.7 kg)	355 kcal	567 kcal	638 kcal	1064 kcal	709 kcal	355 kcal
19.8 lb (9 kg)	364 kcal	582 kcal	655 kcal	1091 kcal	727 kcal	364 kcal