Norwich Terrier Ideal Weight and Diet

Adult standard 5.4 kg (12 lb). A neutered adult at that weight needs about 397 kcal a day. Small breed, Terrier group, typically 12–15 years.

Feeding a Norwich Terrier

397 kcal a day

Cups a day: 1.0
Per meal (×2): 198 kcal
Resting need: 248 kcal
Breed standard: 5.4 kg

the AKC standard is 5.4 kg

Daily calories by life stage

Daily calorie needs for a Norwich Terrier by life stage
Life stage	Factor	Per day	Cups
Neutered adult	×1.6	397 kcal	1.0
Intact adult	×1.8	446 kcal	1.2
Obesity-prone	×1.4	347 kcal	0.9
Weight loss	×1.0	248 kcal	0.7
Puppy under 4 months	×3.0	744 kcal	2.0
Puppy 4-12 months	×2.0	496 kcal	1.3

This is a starting point, not a prescription. Breed standards describe the breed rather than the individual animal, and calorie formulas are estimates that a vet refines by watching the animal. Talk to your veterinarian before changing a diet, and especially before starting a weight-loss plan — sudden weight change can itself be a symptom worth investigating.

What the standard actually says

The AKC standard for the Norwich Terrier gives an adult weight of 5.4 kg and a height of 25–25 cm (10–10 in) at the shoulder. It is one figure rather than a range, which is how the standard is written for this breed — most often as a limit not to be exceeded. Individual dogs still sit either side of it, and a kilogram of difference is not a fault.

Calories follow weight, but not in a straight line. Energy need scales with bodyweight to the power of 0.75, not to the power of one. A Norwich Terrier that is 20% heavier than the standard does not need 20% more food — it needs about 15% more. The same arithmetic runs the other way: trimming a bowl by eye takes off less than the owner thinks.

Neutering matters more than most owners expect. The same Norwich Terrier needs about 446 kcal intact and 397 kcal neutered — roughly 11% less. Feeding the old amount after the operation is one of the commonest routes to a slowly overweight dog.

At the breed standard

Norwich Terrier calorie needs at the breed standard
Standard	Weight	Pounds	Resting need	Neutered adult
AKC standard	5.4 kg	12 lb	248 kcal	397 kcal

By life stage

Norwich Terrier calorie needs by life stage
Life stage	Factor	Per day	Cups
Neutered adult	×1.6	397 kcal	1.0
Intact adult	×1.8	446 kcal	1.2
Obesity-prone	×1.4	347 kcal	0.9
Weight loss	×1.0	248 kcal	0.7
Puppy under 4 months	×3.0	744 kcal	2.0
Puppy 4-12 months	×2.0	496 kcal	1.3

At 5.4 kg, the stated standard. Cups assume 380 kcal per cup — check your own bag.

Frequently asked questions

How much should a Norwich Terrier weigh?

The AKC standard for the Norwich Terrier states a single figure rather than a range: 5.4 kg (12 lb). Real dogs sit either side of it — frame, sex and body condition all move the right weight for an individual animal, which is why vets judge body condition score by hand rather than reading the scales alone. A kilogram either way of the stated figure is not, on its own, a problem.

How many calories does a Norwich Terrier need a day?

A neutered adult at the stated standard (5.4 kg) needs roughly 397 kcal a day — about 1.0 cups of typical dry food at 380 kcal per cup. An intact dog of the same size needs closer to 446, and a puppy under four months around 744.

How is the calorie figure worked out?

Resting Energy Requirement is 70 × bodyweight in kilograms to the power of 0.75, the standard allometric formula. That is then multiplied by a life-stage factor — 1.6 for a neutered adult, 1.8 intact, 3.0 for a puppy under four months. It is a starting point that a vet adjusts by watching how the dog responds, not a prescription.

How much should I feed a Norwich Terrier to lose weight?

A weight-loss plan is fed to the target weight, not the current one — feeding maintenance calories for a body the dog already has is why diets stall. Select "weight loss" in the calculator and enter the target your vet agreed. Never start a weight-loss diet without that conversation: rapid loss is dangerous, and sudden weight change can itself be a symptom.

How long do Norwich Terriers live?

The AKC gives a typical lifespan of 12–15 years for the Norwich Terrier. Keeping a dog at a lean body condition through its life is one of the few things shown to extend it.

Breed standard: American Kennel Club breed standards. Energy formula: Merck Veterinary Manual, nutritional requirements of small animals.

Estimates for informational purposes only and not veterinary advice. Breed standards are ranges, not targets, and healthy weight varies with frame, age, neuter status and body condition score. Calorie formulas are a starting point that a vet adjusts by watching how the dog responds. Talk to your veterinarian before changing a diet, and especially before a weight-loss plan.