12 Newborn Puppy Facts That Help You Understand Their First Weeks
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By Dr Duncan Houston
A newborn puppy can look peaceful while doing the demanding work of growing. Their closed eyes, tiny movements and frequent nursing are part of a developmental stage that depends heavily on maternal care. Understanding what is normal also makes it easier to notice when something is wrong.
Quick Answer
Newborn puppies cannot see, hear or regulate body temperature like adult dogs, and they rely on effective nursing and close care. Weight trends, feeding strength and behaviour are more useful health clues than a rigid milestone chart. A puppy that is weak, cold, failing to nurse or crying persistently needs prompt veterinary attention.
1. A mating date is not an exact due date
Pregnancy is often described as about 63 days, but the interval from mating varies because mating and ovulation do not always coincide. Veterinary timing and assessment are more reliable than counting from one encounter. Do not use an approximate due date to dismiss maternal distress or delayed labour.
2. Their eyes and ear canals are closed at birth
Puppies are born with immature sensory systems. Eyes commonly begin opening around the second week, with hearing developing over the following period. Timing varies. Never prise eyelids open, and ask your vet about swelling, discharge or an unusual difference between littermates.
3. Touch and smell help guide early behaviour
Before vision and hearing become useful, puppies respond to contact, warmth and scent as they orient towards the mother. This is not evidence that they navigate by one special organ alone. A clean, familiar nest supports normal interaction without needing added perfumes or strong cleaning residues.
4. Rooting and suckling are important health observations
A healthy newborn seeks the mother and suckles effectively. Weak attachment, repeated slipping from a nipple or milk appearing at the nose can signal a problem. Frequent attempts to nurse do not prove that enough milk is being obtained.
5. The first milk has a special role
Colostrum supplies antibodies during a short early window when the intestine can absorb them. Ordinary milk replacer is not an equivalent source of this protection. If early nursing fails or the mother cannot feed the litter, contact your vet promptly rather than waiting for visible weight loss.
6. Most early activity is nursing and sleeping
Newborns spend much of their time asleep, but a precise percentage is less useful than watching how they respond when handled and whether they feed well. A content puppy usually settles after nursing. A limp, unresponsive or poorly feeding puppy is not simply a particularly good sleeper.
7. Warmth is a care requirement, not a preference
Very young puppies cannot regulate temperature as an adult dog does. They need an age-appropriate environment monitored at puppy level. An ordinary cool room may be inadequate, while unregulated heating can burn or overheat them.
Ask your veterinary team how to provide controlled warmth safely, including space for the mother to move away. A cold puppy needs urgent guidance; force-feeding before it is safely warmed can cause aspiration and other complications.
8. The mother helps them toilet
During early life, maternal licking stimulates urination and defecation. Orphaned puppies or those not receiving maternal care may need gentle assistance. Have a veterinary professional demonstrate the method and explain what output to expect. Vigorous rubbing can injure delicate skin.
9. A scale can reveal trouble before appearance does
Weigh each puppy separately on an accurate scale and keep a consistent record, commonly twice daily during the first week as advised. Compare the trend for that puppy rather than assuming the smallest must be ill or the largest must be thriving.
Poor gain, weight loss or a change in feeding strength warrants prompt advice. Automatic extra formula can miss a congenital problem, infection or maternal illness that needs treatment.
10. Baby teeth and solid food arrive gradually
Puppies are usually born without erupted teeth. Baby teeth begin appearing over the following weeks, and interest in softened complete puppy food often develops around three to four weeks. Weaning progresses alongside nursing rather than replacing it overnight.
Do not use cow's milk, random supplements or hard chews to hurry development. A puppy that struggles to eat or has an abnormal bite should be examined.
11. Littermates provide valuable early learning
As puppies become mobile, play and interaction help them learn canine communication. Eating solid food does not mean this learning is complete. Cornell's guidance describes eight weeks as a usual minimum for leaving the mother and litter, with some puppies benefiting from longer.
12. Development is rapid, but it is not identical
Over the first weeks, crawling gives way to more coordinated walking, exploration and play. Breed, health and individual variation affect progress. Gentle handling and manageable experiences can support confidence; repeated startling or forcing contact does not improve resilience.
Notice the direction of change. A puppy losing a skill, becoming less active or consistently falling behind needs assessment rather than reassurance based only on age.
Turn observations into a simple daily check
Record weight, nursing or food intake, activity, stool and any unusual signs. Check the mother too: painful mammary glands, refusal to feed, illness or abnormal discharge can affect the whole litter. Keep emergency contact details beside the care record.
Seek urgent care for failure to nurse, persistent crying, weakness, chilling, breathing difficulty, diarrhoea, a painful swollen abdomen or seizures. Do not wait 24 to 48 hours to see whether a newborn improves. Early veterinary examination of the mother and litter is an important starting point, even when all seem well.
Frequently Asked Questions
Should every puppy open its eyes on the same day?
No. Timing varies, but swelling, discharge or a concerning developmental difference should be discussed with your vet.
Can I hand-rear a puppy with an online milk recipe?
Use a veterinary feeding plan and an appropriate canine milk replacer. Feeding amount, frequency and technique all matter.
Does constant crying mean hunger?
Hunger is one possibility, but cold, overheating, pain and illness can also cause distress. Persistent crying needs assessment.
Further reading includes Merck's neonatal management guide, its canine reproduction overview and UC Davis neonatal-care advice.
Newborn puppies change remarkably quickly. Careful, gentle observation helps you appreciate those changes while protecting puppies that need extra support.
If you would like help organising observations or questions about early development, ASK A VET™ can support you. A weak, cold or non-feeding puppy needs urgent veterinary attention.
