Brittany Puppy Weight Calculator

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

Brittany Growth Guide and Breed Profile

Breed Overview

The Brittany, formerly known as the Brittany Spaniel, is a versatile hunting dog with roots in the Brittany region of France. Bred for bird hunting, Brittanys are agile, intelligent, and full of energy. They’re known for their affectionate temperament and strong desire to please, making them ideal companions for active families and hunters alike.

Falling into the medium breed category, Brittanys are typically lean, muscular, and athletic. Adult Brittanys generally weigh between 30 and 40 pounds, and their high activity level means they require careful attention to both growth and nutrition during their development.

Brittany Growth Chart & Weight Ranges

Below is an estimated weight range for Brittany puppies as they grow. These figures can vary slightly depending on genetics, gender, and activity level.

Age	Weight Range (Male)	Weight Range (Female)
4 weeks	3–5 lbs	2.5–4.5 lbs
8 weeks	7–10 lbs	6–9 lbs
3 months	12–17 lbs	10–15 lbs
4 months	16–21 lbs	14–19 lbs
6 months	22–28 lbs	20–26 lbs
9 months	26–34 lbs	24–32 lbs
12 months	30–40 lbs	28–38 lbs

Note: Males typically weigh 2–5 lbs more than females throughout development.

How Much Bigger Will My Brittany Puppy Get?

Most Brittany puppies reach about 50% of their adult weight by 4 months and 80–90% by 6–7 months. While many Brittanys appear full-grown by their first birthday, they may continue to fill out in muscle and chest depth until 14–16 months.

Rule of thumb:

Double your Brittany’s weight at 16 weeks to estimate their adult weight.

Unlike giant breeds that continue growing into their second year, Brittanys usually complete their physical growth by 12–15 months.

Brittany Growth Tips

Nutrition

Feeding your Brittany puppy a balanced, medium-breed puppy formula supports healthy bone and muscle development. Avoid overfeeding, as excess weight can strain their joints and reduce endurance.

• Feed 3 meals daily until 6 months old; transition to 2 meals per day after that.
• Choose food rich in protein, with omega fatty acids to support their high energy and coat condition.

The American Kennel Club recommends choosing high-quality food suited to active breeds.

Exercise

Brittanys are naturally energetic and thrive with consistent daily exercise. However, puppies shouldn’t be pushed too hard.

• Encourage safe play and short walks during early months.
• Avoid excessive jumping or long-distance runs until joints are mature (around 12 months).
• Mental stimulation is essential—consider puzzle toys or light training.

Health Watch

While Brittanys are generally healthy, be alert for growth-related or inherited issues such as:

• Hip dysplasia – keep your pup at a healthy weight to reduce stress on joints.
• Epilepsy – although not related to growth, it may show up during young adulthood.
• Sensitive digestion – introduce new foods gradually to avoid gastrointestinal upset.

Regular vet visits and weight checks will help you monitor your Brittany’s development and catch any early issues.