Norfolk Terrier Weight & Growth Chart

Complete weight guide with growth charts for male and female Norfolk Terriers from puppy to adult.

Male Adult Weight

11–12 lbs

Female Adult Weight

9–10 lbs

Norfolk Terrier Weight Overview

The Norfolk Terrier weighs 11–12 lbs at maturity. Males (11–12 lbs) are typically heavier than females (9–10 lbs).

Among the smallest terrier breeds at 11 to 12 pounds and 9 to 10 inches tall, they are compact and sturdy with good bone for their size.. The growth chart below shows the typical weight progression from puppyhood to adulthood.

Growth Chart

When Does a Norfolk Terrier Stop Growing?

Expect your Norfolk Terrier to reach adult height of 9–10 inches by 12–15 months. Full body maturity—including muscle development toward the 11–12 lb target—may continue until 14–18 months.

Growth is influenced by genetics, nutrition quality, and spay/neuter timing. Mitral valve disease is a significant breed concern, with cardiac screening recommended for all Norfolk Terriers used in breeding programs..

Is My Norfolk Terrier Overweight?

Assessing your Norfolk Terrier's body condition (healthy range: 11–12 lbs):

Rib check: Run your hands along the ribcage—you should feel individual ribs under a slight fat layer
Overhead view: A defined waist should be visible between ribs and hips
Side profile: The abdomen should tuck upward behind the last rib

Overweight Norfolk Terriers face higher risks of Mitral Valve Disease, joint problems, and shortened lifespan. Even for a small-sized breed, excess weight significantly impacts joint health and overall wellbeing. Work with your vet to adjust feeding and exercise if needed.

Feeding Recommendation

Plan on 0.5–0.2 cups of premium dry food daily for your adult Norfolk Terrier, divided into morning and evening meals. Given this terrier breed's predisposition to Mitral Valve Disease, discuss dietary approaches that may help manage this risk with your vet. Among the smallest terrier breeds at 11 to 12 pounds and 9 to 10 inches tall, they are compact and sturdy with good bone for their size..

Weight by Age Table

Age	Male (lbs)	Female (lbs)
3 months	2.8–3.2	2.4–2.7
6 months	6.1–7.1	5.2–6.0
9 months	8.9–10.3	7.5–8.8
12 months	11.1–12.9	9.4–11.0

Frequently Asked Questions

Adult Norfolk Terriers weigh 11–12 lbs (males: 11–12 lbs; females: 9–10 lbs). Among the smallest terrier breeds at 11 to 12 pounds and 9 to 10 inches tall, they are compact and sturdy with good bone for their size..

The Norfolk Terrier reaches full adult size (9–10 inches, 11–12 lbs) by approximately 12–15 months. Moderate exercise needs of 30 to 45 minutes daily, satisfied with walks, yard play, and interactive games that engage their quick minds and hunting instincts.. Growth rate is influenced by genetics, diet, and overall care.

For a Norfolk Terrier at healthy weight (11–12 lbs), you should feel ribs without pressing hard, see a defined waist from above, and notice an abdominal tuck from the side. Even modest excess weight stresses this small-sized breed's frame and can worsen conditions like Mitral Valve Disease.

Feeding amounts depend on age, current weight, and the Norfolk Terrier's expected adult size of 11–12 lbs. Puppies under 6 months need 3–4 meals daily; older puppies eat twice daily. A high-quality puppy food formulated for small breeds provides the right nutrient balance. Mitral valve disease is a significant breed concern, with cardiac screening recommended for all Norfolk Terriers used in breeding programs..

If your Norfolk Terrier puppy isn't gaining weight as expected (target adult weight: 11–12 lbs), consult your vet. Common causes include intestinal parasites, insufficient calorie intake, or malabsorption. The breed's predisposition to Mitral Valve Disease could also be a factor worth investigating. A fecal test and blood work are typically the first diagnostic steps.