Kooikerhondje puppy growth: milestones and weight estimates
How fast a Kooikerhondje puppy grows, illustrative weight estimates and the limits of predicting adult size.
Puppies reach adult height by around 10 to 12 months and keep filling out until about 14 months. Mentally they stay young for longer, and most Kooikers settle into adult behavior around 2 years. The adult coat, with its full ear feathering and plumed tail, is usually complete by 18 months.
Socialization during growth shapes this breed more than most. Plan gentle, positive experiences with people, handling, traffic and noise every week of the first year. Physically, watch for a young dog that becomes unsteady or weak in the hind legs, and contact your vet promptly if you see it.
Kooikerhondje puppy growth in numbers
Illustrative size-based model for a male Kooikerhondje, in kg, by age in months
| Age | Female | Male |
|---|---|---|
| 2 months | 2.2 kg | 2.4 kg |
| 3 months | 3.5 kg | 3.8 kg |
| 4 months | 4.8 kg | 5.3 kg |
| 5 months | 5.8 kg | 6.4 kg |
| 6 months | 6.7 kg | 7.4 kg |
| 7 months | 7.5 kg | 8.2 kg |
| 8 months | 8.2 kg | 9 kg |
| 9 months | 8.7 kg | 9.6 kg |
| 10 months | 9.2 kg | 10 kg |
| 12 months | 9.8 kg | 11 kg |
| 14 months | 10 kg | 11 kg |
This is an editorial model scaled to a typical adult weight, not an observed breed average, a validated growth standard or a healthy-weight range. Do not adjust food to make a puppy follow this line. Discuss actual growth measurements with your vet.