Sussex Spaniel Growth Chart
Expected weight by age, week by week
Sussex Spaniel puppies grow at a fairly predictable rate as a percentage of their eventual adult size. Use this table as a general guide - every puppy is different.
| Age | Male weight | Female weight |
|---|---|---|
| 4 weeks (~0.9 mo) | 1.8–2.2 kg (3.9–4.9 lb) | 1.8–2.2 kg (3.9–4.9 lb) |
| 8 weeks (~1.8 mo) | 3.2–4 kg (7.1–8.8 lb) | 3.2–4 kg (7.1–8.8 lb) |
| 12 weeks (~2.8 mo) | 5.3–6.6 kg (11.6–14.6 lb) | 5.3–6.6 kg (11.6–14.6 lb) |
| 16 weeks (~3.7 mo) | 7.2–9 kg (15.9–19.8 lb) | 7.2–9 kg (15.9–19.8 lb) |
| 20 weeks (~4.6 mo) | 8.8–11 kg (19.4–24.3 lb) | 8.8–11 kg (19.4–24.3 lb) |
| 24 weeks (~5.5 mo) | 10.4–13 kg (22.9–28.7 lb) | 10.4–13 kg (22.9–28.7 lb) |
| 28 weeks (~6.4 mo) | 11.7–14.6 kg (25.7–32.2 lb) | 11.7–14.6 kg (25.7–32.2 lb) |
| 32 weeks (~7.4 mo) | 12.8–16 kg (28.2–35.3 lb) | 12.8–16 kg (28.2–35.3 lb) |
| 36 weeks (~8.3 mo) | 13.6–17 kg (30–37.5 lb) | 13.6–17 kg (30–37.5 lb) |
| 40 weeks (~9.2 mo) | 14.4–18 kg (31.7–39.7 lb) | 14.4–18 kg (31.7–39.7 lb) |
| 44 weeks (~10.1 mo) | 14.9–18.6 kg (32.8–41 lb) | 14.9–18.6 kg (32.8–41 lb) |
| 48 weeks (~11 mo) | 15.4–19.2 kg (33.9–42.3 lb) | 15.4–19.2 kg (33.9–42.3 lb) |
| 52 weeks (~12 mo) | 15.7–19.6 kg (34.6–43.2 lb) | 15.7–19.6 kg (34.6–43.2 lb) |
Common questions
How much should a Sussex Spaniel weigh at 3 months old?
At around 12 weeks (3 months), a Sussex Spaniel puppy typically weighs about a third of their eventual adult weight - roughly 5.3–6.6 kg for males and 5.3–6.6 kg for females, based on this breed's adult weight range of 16–20 kg (male) and 16–20 kg (female).
When does a Sussex Spaniel stop growing?
Most Sussex Spaniels reach close to their full adult weight by around 12 months old, though medium breeds can continue filling out in muscle and chest depth for several months after that. Larger breeds generally take longer to fully mature than smaller ones.
My Sussex Spaniel puppy seems small/large for their age, should I worry?
Individual puppies vary, and these figures are typical ranges, not strict rules - genetics, litter size, and nutrition all play a part. If your puppy is well outside these ranges, gaining or losing weight rapidly, or you're generally concerned, check with your vet rather than relying on any online chart alone.
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