Home / Puppy / Puppy Development / Weeks 3 to 4
This page is one stage of our puppy development series, which splits the first year into the stretches where life actually changes for a puppy and for the people living with one. The full timeline in a single read is our wave companion guide, puppy development week by week; this series goes slower, one stage at a time, so you can check what is normal right now, what feeding looks like right now, and which vet and socialization jobs belong to these exact weeks or months. Timings are typical ranges from the sources listed below. Small breeds often run ahead of large ones, and individual puppies vary more than any chart admits.
Week 3 is the hinge of early puppyhood. The ear canals open at roughly 3 weeks, the eyes that opened at the end of week 2 sharpen, and puppies begin to react to sounds, movement and each other as individuals rather than as warm obstacles. Standing becomes wobbling, wobbling becomes walking, and by week 4 most puppies are toddling with intent, falling over regularly and getting straight back up. Play begins in this stage, clumsy mouthing and pawing at littermates that is the first draft of every social skill the dog will ever have.
Baby teeth start pushing through during these weeks, which is one reason weaning begins now: nursing a litter of needle-toothed puppies becomes uncomfortable for the mother, and she starts spending short stretches away from the box. Puppies also gain control of their own toileting in this stage and begin moving away from the sleeping area to relieve themselves, the very first root of housetraining later.
The AKC's weaning guidance describes breeders offering a first soft puppy mush at around 3 weeks: puppy food softened into a gruel that puppies can lap. The first sessions are messy and brief, more walking through the bowl than eating from it, and the mother still provides most of the nutrition. Across weeks 3 and 4 the mush gradually thickens toward soaked kibble. Puppies should always have their mother available alongside; weaning is a slope, not a switch, and a puppy that is slow to take to the bowl usually catches up within days.
The sensitive socialization period is generally placed from about 3 weeks onward, and the AKC's early development guidance describes breeders introducing new surfaces, gentle household sounds and short experiences outside the whelping box from about this age. Everything is small and calm: a different floor texture under the paws, a radio at low volume, being handled by a second trusted person. Puppies this young tire and chill quickly, so sessions are short and the whelping box stays home base.
Still mostly the breeder's stage, but this is visiting season for many buyers, and it is a useful one. Watch how the litter reacts to sounds and handling, ask what surfaces and noises the breeder has introduced, and ask what food the puppies are being weaned onto, because you will need the same food for the first week at home. Note the puppies that approach, the ones that hang back and the ones that recover quickly from a startle; temperament at 4 weeks is not destiny, but recovery speed is a genuinely useful thing to see. Worming continues on the breeder's schedule, and stool checks begin under veterinary direction.
Vet milestones for this whole series follow two published guides. The AKC's generally accepted guideline starts the core vaccine series at 6 to 8 weeks (distemper and parvovirus), gives a DHPP booster at 10 to 12 weeks, and a further DHPP booster plus rabies at 16 to 18 weeks, with lifestyle vaccines decided with your veterinarian. The MSD Veterinary Manual owner guide adds why the series repeats: the protection puppies get from their mother fades at an unknown point, so doses repeat every 2 to 3 weeks until about 4 months, and puppies should be kept away from unvaccinated dogs and dogs of unknown status until the series is finished. Your own veterinarian's dates for your puppy always win over any general chart.
Series navigation: all development stages | our single-page summary, puppy development week by week | the first year hub.
Puppies begin standing and taking unsteady steps during week 3, and by week 4 most are walking with growing confidence, though falls are constant and normal. A puppy that cannot bear weight or seems in pain is a different matter and needs a veterinary check.
Breeders typically offer a first soft puppy mush at around 3 weeks, following the AKC's weaning guidance, and thicken it gradually toward soaked kibble over the following weeks. The mother still provides most nutrition at this stage.
Baby teeth begin erupting from around 3 weeks and continue over the next few weeks, with the full set of 28 baby teeth usually in place by about 6 to 8 weeks. Teething is one reason mothers begin weaning the litter during this stage.
From about 3 weeks. Breeders following AKC early development guidance start introducing new surfaces, gentle sounds and brief handling by different people in this stage, keeping every experience short, warm and calm.
No. Puppies are only just beginning to eat soft food at this age and still depend on their mother and littermates for nutrition, warmth and social learning. The MSD Veterinary Manual puts puppies leaving their mother at about 7 to 8 weeks, when they can feed themselves properly.
This page is general information drawn from the published guidance of the organizations listed under Sources below. It is not veterinary advice, and it does not replace your own veterinarian, who knows your dog. If your dog has eaten something toxic, contact your veterinarian, the ASPCA Animal Poison Control Center on (888) 426-4435, or the Pet Poison Helpline on (855) 764-7661 straight away. A consultation fee may apply on the helplines.
Last updated: November 2026. Timings are the typical ranges described by the sources above; individual puppies vary, and your veterinarian's advice governs vaccines and feeding changes. How we work: our methodology.