Cavalier King Charles Spaniel Weight Chart & Growth Guide
Age-by-age weight reference for Cavalier King Charles Spaniels — from tiny puppies through adulthood — to help you keep your Cavalier at a healthy weight.
About the Cavalier King Charles Spaniel
The Cavalier King Charles Spaniel is one of the most popular companion dogs in the world, renowned for their silky coats, large expressive eyes, and extraordinarily gentle disposition. Despite their royal name, Cavaliers are adaptable, affectionate dogs that fit comfortably into apartments and family homes alike.
Cavaliers are small dogs — classified as a toy breed by major kennel clubs — but they have the heart and energy of a much larger dog. They love both cuddling on the sofa and trotting alongside their owners on walks, making them equally suited for active and laid-back lifestyles.
Weight management is particularly important for Cavaliers, as the breed is genetically prone to mitral valve disease (MVD) — a heart condition that becomes more serious with excess body weight. Keeping your Cavalier lean and at an ideal body condition score is one of the most impactful things you can do for their long-term heart health.
Cavalier King Charles Spaniel Weight Chart by Age
Adult males typically weigh 5.9–8.2 kg (13–18 lbs); females are slightly lighter at 5.4–7.3 kg (12–16 lbs). Most Cavaliers reach their adult weight by 12–18 months.
Male Cavalier King Charles Spaniel
| Age | Weight |
|---|---|
| 8 weeks | 0.9–1.5 kg (2–3.3 lbs) |
| 3 months | 1.8–2.7 kg (4–6 lbs) |
| 6 months | 3.6–5.5 kg (8–12 lbs) |
| 9 months | 4.5–6.8 kg (10–15 lbs) |
| 12 months | 5.4–7.7 kg (12–17 lbs) |
| 18 months | 5.9–8.2 kg (13–18 lbs) |
| Adult (2+ yrs) | 5.9–8.2 kg (13–18 lbs) |
Female Cavalier King Charles Spaniel
| Age | Weight |
|---|---|
| 8 weeks | 0.8–1.4 kg (1.8–3 lbs) |
| 3 months | 1.5–2.3 kg (3.3–5 lbs) |
| 6 months | 2.7–4.5 kg (6–10 lbs) |
| 9 months | 3.6–5.9 kg (8–13 lbs) |
| 12 months | 4.5–6.8 kg (10–15 lbs) |
| 18 months | 5.4–7.3 kg (12–16 lbs) |
| Adult (2+ yrs) | 5.4–7.3 kg (12–16 lbs) |
Tips for Maintaining a Healthy Weight
- Given their heart disease predisposition, keeping your Cavalier lean is one of the best preventive health measures.
- Feed twice daily with measured portions — free-feeding easily leads to overeating in this breed.
- After spaying or neutering, reduce portions by 15–20% to account for lower metabolic needs.
- Provide at least 30–45 minutes of gentle daily exercise — long runs on hot days are hard on their short muzzles.
- Weigh monthly; a gain of 0.5 kg may not seem like much but represents 6–8% of their ideal body weight.
- Limit treats and table scraps — their expressive eyes make it easy to inadvertently overfeed them.
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