Cocker Spaniel Weight Chart by Age

An adult male Cocker Spaniel weighs 25.0–30.0 lb (11.3–13.6 kg) and an adult female 20.0–25.0 lb (9.1–11.3 kg), according to the American Kennel Club breed standard.

At 3 months a typical male weighs 9.8 lb (4.4 kg) and a typical female 8.2 lb (3.7 kg). Half of males weigh 8.0–11.7 lb (3.6–5.3 kg), and half of females 6.8–9.9 lb (3.1–4.5 kg). A typical puppy is around 35% of its adult weight at this age.

At 4 months a typical male weighs 13.9 lb (6.3 kg) and a typical female 11.5 lb (5.2 kg). Half of males weigh 11.7–16.3 lb (5.3–7.4 kg), and half of females 9.6–13.4 lb (4.4–6.1 kg). A typical puppy is about 51% of the way to adult weight.

At 6 months a typical male weighs 20.1 lb (9.1 kg) and a typical female 16.1 lb (7.3 kg). Half of males weigh 17.2–23.3 lb (7.8–10.6 kg), and half of females 13.9–18.7 lb (6.3–8.5 kg).

At 12 months a typical male weighs 25.3 lb (11.5 kg) and a typical female 20.4 lb (9.2 kg). Half of males weigh 21.5–29.4 lb (9.8–13.3 kg), and half of females 17.4–23.8 lb (7.9–10.8 kg). That is about 92% of final weight, with the rest filling in over the following months.

Dogs of this size that were weighed both as puppies and as adults ended up at about 2.1 times their 4-month weight, in records from US veterinary clinics. The calculator on the home page uses those records for the puppy’s own age and weight, and returns a range rather than one number.

Height is usually settled first; weight keeps filling in for longer. On the growth curve for its size, a Cocker Spaniel stays above 95% of adult weight from about 14 months, and the last 8% after its first birthday comes on slowly.

Yes, and by enough to matter. Adult males run 25.0–30.0 lb (11.3–13.6 kg) against 20.0–25.0 lb (9.1–11.3 kg) for females. Comparing a female against a chart that does not separate the sexes will usually make her look underweight when she is not.

A medium breed, defined by adult weight. That classification determines the growth curve used here: veterinary research shows dogs of similar adult size grow at similar rates regardless of breed.

Not necessarily: 1 in 10 healthy puppies weighs less than the lightest figure in the table. What matters more is the trend. A puppy that drifts from one part of the range to a lower one is worth checking: look at its body condition and ask your vet about its diet. A single low reading is not a diagnosis.

Body condition tells you more than the scale. You should be able to feel the ribs under a thin layer of fat without pressing, see a waist from above, and see the belly tuck up from the side. A dog can sit inside the weight range and still carry too much fat.

Most published charts come from one breeder’s litters or from unsourced rules of thumb, and many do not say whether the figures are for males, females or both. The ranges here come from centile curves fitted to millions of veterinary bodyweight records, scaled to the AKC adult range, and split by sex.

The research behind these curves found neutering shifted growth trajectory only slightly, by less than the variation between individual dogs, so separate curves were not needed. Neutering is associated with a higher chance of becoming overweight in adulthood, which is a body condition question rather than a growth chart one.

An adult Cocker Spaniel weighs 11.3–13.6 kg for males and 9.1–11.3 kg for females under the American Kennel Club standard. A typical male weighs 4.4 kg at 3 months, 9.1 kg at 6 months and 11.5 kg at 12 months; a typical female 3.7 kg, 7.3 kg and 9.2 kg. The charts above give every month in kilograms, with a switch to pounds.

The American Kennel Club standard gives females 20.0–25.0 lb (9.1–11.3 kg). A typical female Cocker Spaniel weighs 11.5 lb at 4 months, 16.1 lb at 6 months and 20.4 lb at 12 months. Weight stays above 95% of the adult figure from about 14 months. The female chart above gives every month.

The American Kennel Club standard gives males 25.0–30.0 lb (11.3–13.6 kg). A typical male Cocker Spaniel weighs 13.9 lb at 4 months, 20.1 lb at 6 months and 25.3 lb at 12 months. Weight stays above 95% of the adult figure from about 14 months. The male chart above gives every month.