Puppy Week-by-Week Guide: First 12 Weeks
Veterinary references checked with PetHealth+ · Last reviewed June 2026
By Kaiser Khan , Founder Veterinary references checked with PetHealth+ ( process ) Last reviewed Cite this page How we research & review
Weeks 8–12 are critical for socialisation, toilet training, and bite inhibition. Predictable routines, short positive exposures, and vet checks at 8, 12, and 16 weeks build a confident adult dog.
Weeks 8–9
Settle in, begin crate and toilet routine, first vet visit.
Weeks 10–12
Expand socialisation, start basic cues, manage teething.
Avoid
Dog parks and unknown dogs until vaccination course completes.
Related: How to care for a puppy · Puppy biting
Frequently asked questions
When do puppies sleep through the night?
Many manage 6–7 hours by 12–16 weeks with crate training.
How much exercise per week?
Short frequent play — avoid forced running on hard surfaces while growing.
When start training classes?
Puppy classes often from 10–12 weeks after first vaccines.
What should puppies chew?
Rubber teething toys and frozen carrots — redirect biting from hands.