PuppyweeksPuppy weeks 5–7
Puppy weeks 5–7: Peak Socialization
Weeks 5–7 are the peak of the socialisation window — puppies are learning, at a neurological level, what counts as normal and safe. Positive, low-pressure exposures now have outsized lifelong impact, so keep everything short, calm, and rewarding, and never flood or force. Bite inhibition also develops fast through littermate play.
When does this happen?
| All breed sizes | Weeks 5–7 |
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Not sure this is your puppy’s exact stage? Check the Puppy Stage Finder. Curious what training can realistically start this early? See the full training timeline.
Common questions
What is the puppy socialisation window?
It’s the developmental period — peaking around weeks 5–7 and beginning to close around weeks 12–14 — when a puppy learns what’s safe and normal. Positive experiences during it shape lifelong temperament.
How do you socialise a puppy safely before vaccinations?
Favour controlled, positive exposure to sounds, surfaces, and gentle handling over crowded or high-risk settings. AVSAB notes the behavioural risk of under-socialising usually outweighs the disease risk — but confirm the specifics with your vet.
Grounded in established canine behavioural science — see our sources.