Harrier Puppy Weight Calculator

Calculate the adult weight for your Harrier. Just type your puppy’s current weight and age, and see how big your puppy gets.

Harrier Breed Profile & Growth Guide

Breed Overview

The Harrier is a scent hound bred for stamina and pack hunting, with a history dating back to medieval England. Developed to track hare and fox over long distances, Harriers share ancestry with the English Foxhound and the Beagle. They have a sturdy, muscular build and an exceptional sense of smell, making them outstanding tracking and field dogs.

In the home, Harriers are friendly, energetic, and outgoing. They enjoy companionship—whether human or canine—and thrive on attention and activity. Though not as common as other hounds, the Harrier makes a loyal and affectionate family dog with proper socialization and exercise.

Size Category: Medium to Large
Harriers typically fall into the medium-large breed category, standing 19–21 inches tall and weighing 45–60 lbs at maturity. Because of their active lifestyle and working background, tracking their growth is important to ensure healthy muscle development, prevent overfeeding, and support joint health during puppyhood.

For more information, visit the AKC Harrier breed page.

Harrier Growth Chart & Weight Ranges

Age	Male Weight (lbs)	Female Weight (lbs)
4 weeks	4 – 6	3 – 5
8 weeks	9 – 12	8 – 11
3 months	18 – 23	16 – 21
4 months	23 – 28	20 – 26
6 months	30 – 38	27 – 35
9 months	38 – 46	34 – 42
12 months	45 – 60	40 – 55
18 months	47 – 62 (full)	42 – 57 (full)

Note: Males tend to weigh 5–10 lbs more than females and may develop more muscle mass and broader frames.

How Much Bigger Will My Harrier Puppy Get?

Harrier puppies grow steadily, reaching the majority of their adult size in the first year. You can expect these general growth milestones:

• 50% of adult weight by 4–5 months
• 75% of adult weight by 6–7 months
• Full adult weight by 12–15 months

Rule of thumb:
Double your Harrier puppy’s weight at 16 weeks for a rough estimate of adult size.

Exceptions:
Some Harriers, especially those from hunting lines, may take a bit longer to fill out in the chest and muscle—sometimes up to 18 months. Growth can vary depending on genetics and activity level.

For additional insights on breed health and care, see the Harrier Club of America.

Harrier Growth Tips

Nutrition

• Feeding Schedule: Offer 3 meals daily until 6 months of age, then transition to 2 meals per day.
• Puppy Diet: Use a balanced medium- to large-breed puppy formula with appropriate calcium and phosphorus to support bone and joint development.
• Harriers are active and may burn more calories than average, but avoid overfeeding to prevent early joint strain or obesity.

Exercise

• Harrier puppies are high-energy and need daily activity, but should avoid forced running or repetitive jumping until growth plates are closed (around 12–15 months).
• Encourage free play, social walks, and mental games to prevent boredom-related behavior issues.

Health Watch

• Hip dysplasia: Although not as common as in giant breeds, it is still worth screening—especially in active or working Harriers.
• Ear infections: Their long ears can trap moisture—regular cleaning helps prevent infection.
• Growth-related issues: Watch for limping, lethargy, or reluctance to exercise, which may indicate joint stress.