Cavalier King Charles Spaniel Weight & Growth Chart

Complete weight guide with growth charts for male and female Cavalier King Charles Spaniels from puppy to adult.

Male Adult Weight

13–18 lbs

Female Adult Weight

11–15 lbs

Cavalier King Charles Spaniel Weight Overview

Adult Cavalier King Charles Spaniels typically weigh between 13 and 18 pounds, with males generally being larger than females. Males average 13–18 lbs while females typically weigh 11–15 lbs.

Adults typically weigh 12 to 18 pounds, making them one of the larger toy breeds. They are sturdier and more athletic than their gentle demeanor suggests..

Growth Chart

When Does a Cavalier King Charles Spaniel Stop Growing?

Expect your Cavalier King Charles Spaniel to reach adult height of 12–13 inches by 12–15 months. Full body maturity—including muscle development toward the 13–18 lb target—may continue until 14–18 months.

Growth is influenced by genetics, nutrition quality, and spay/neuter timing. Unfortunately burdened with serious genetic health issues, particularly mitral valve disease and syringomyelia, making health testing of breeding stock absolutely critical..

Is My Cavalier King Charles Spaniel Overweight?

Is your Cavalier King Charles Spaniel at a healthy weight? The ideal range is 13–18 lbs (males 13–18, females 11–15). Check these three signs:

Ribs: Easily felt with light pressure; not visible but not buried under fat
Waistline: A clear narrowing behind the ribs when viewed from above
Abdominal tuck: The belly slopes upward from the ribcage to the hind legs when viewed from the side

If your dog fails any of these checks, consult your vet. Unfortunately burdened with serious genetic health issues, particularly mitral valve disease and syringomyelia, making health testing of breeding stock absolutely critical..

Feeding Recommendation

Plan on 0.5–0.4 cups of premium dry food daily for your adult Cavalier King Charles Spaniel, divided into morning and evening meals. Given this toy breed's predisposition to Mitral Valve Disease, discuss dietary approaches that may help manage this risk with your vet. Adults typically weigh 12 to 18 pounds, making them one of the larger toy breeds. They are sturdier and more athletic than their gentle demeanor suggests..

Weight by Age Table

Age	Male (lbs)	Female (lbs)
3 months	4.1–4.9	3.5–4.2
6 months	9.0–10.8	7.6–9.2
9 months	13.1–15.7	11.1–13.4
12 months	16.4–19.6	13.9–16.7

Frequently Asked Questions

Adult Cavalier King Charles Spaniels weigh 13–18 lbs (males: 13–18 lbs; females: 11–15 lbs). Adults typically weigh 12 to 18 pounds, making them one of the larger toy breeds. They are sturdier and more athletic than their gentle demeanor suggests..

The Cavalier King Charles Spaniel reaches full adult size (12–13 inches, 13–18 lbs) by approximately 12–15 months. Moderate exercise suits them well: 30 to 60 minutes daily of walks and play. They adapt to both active and sedentary lifestyles remarkably well.. Growth rate is influenced by genetics, diet, and overall care.

For a Cavalier King Charles Spaniel at healthy weight (13–18 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.

A Cavalier King Charles Spaniel puppy growing toward 13–18 lbs needs carefully measured portions. Feed 3–4 times daily until 6 months, then twice daily. With moderate energy levels (3/5), avoid overfeeding to prevent excess weight gain. Monitor body condition weekly and adjust as needed.

Poor weight gain in a Cavalier King Charles Spaniel puppy warrants a vet visit. For a breed that should reach 13–18 lbs at maturity, slow growth can signal parasites (very common in puppies), underfeeding, food intolerance, or illness. Regular weigh-ins help track progress objectively. Your vet will likely run a fecal test and blood work.