Is My Puppy Growing Normally?
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What size breed is this puppy?
Expected weight varies dramatically by breed size — this helps us give you an accurate target.
One of the first questions breeders ask after a litter arrives is whether the puppies weigh what they should.
It is a natural question. Birth weight feels like an objective measure — a number that says whether a puppy is off to a good start or not.
The reality is more nuanced. Birth weight matters, but it is one data point in a picture that only becomes clear over time. Understanding what weight numbers actually tell you — and what they do not — helps breeders make better decisions and avoid unnecessary alarm.
Why birth weight varies so much
There is no single correct birth weight for a newborn puppy because puppies come in an enormous range of sizes.
A healthy newborn Chihuahua may weigh 75 to 100 grams. A healthy newborn Golden Retriever may weigh 400 grams or more. Both are normal — for their breed.
Even within a single breed, birth weight varies based on litter size, the mother's size and condition, genetics, and individual development. Puppies from large litters are often smaller at birth than puppies from small litters, even within the same bloodline.
This is why breed-specific averages and generic puppy weight charts have limited practical value. They can offer a rough reference point, but they cannot tell you whether a specific puppy in a specific litter is doing well.
What matters more than the number itself is how that puppy's weight changes over the following days.
General birth weight ranges by breed size
While individual variation is significant, broad ranges by breed size can serve as a rough orientation when evaluating a newborn litter.
Toy breeds (Chihuahua, Yorkshire Terrier, Maltese, Pomeranian): Birth weights typically range from approximately 75 to 200 grams. Puppies at the lower end of this range require close monitoring, as their reserves are very limited.
Small breeds (French Bulldog, Shih Tzu, Cavalier King Charles Spaniel): Birth weights typically range from approximately 150 to 300 grams. Variation within litters can be significant in this size group.
Medium breeds (Beagle, Cocker Spaniel, Border Collie): Birth weights typically range from approximately 200 to 400 grams.
Large breeds (Labrador Retriever, German Shepherd, Golden Retriever): Birth weights typically range from approximately 300 to 600 grams.
Giant breeds (Great Dane, Saint Bernard, Bernese Mountain Dog): Birth weights can range from approximately 400 grams to over 700 grams.
These ranges are broad and intended only as general orientation. Healthy puppies regularly fall outside them in either direction. If a puppy's birth weight concerns you, the days that follow will provide far more information than the birth weight alone.
Reference
Typical Birth Weights by Breed Size
Ranges are approximate. Individual litter variation is wide — trends matter more than targets.
The first 24 hours: the initial dip
It is normal for puppies to lose a small amount of weight in the first day of life.
This initial dip reflects fluid loss and the transition from the womb to the outside world. Most puppies lose a few percent of their birth weight in the first twenty-four hours before nursing begins to replenish their reserves.
This initial loss is not a cause for concern on its own. It becomes relevant only if it continues beyond the first day or two, or if the puppy appears lethargic, cold, or unable to nurse.
By day two or three, most puppies have returned to their birth weight and begin gaining steadily. This is the point at which weight monitoring becomes most informative.
Expected daily weight gain in the first two weeks
Once the initial post-birth dip resolves, healthy puppies gain weight consistently every day.
A commonly referenced guideline is that puppies gain roughly five to ten percent of their body weight per day in the first two weeks. In practical terms, this translates to very different gram amounts depending on breed size.
A 100-gram toy breed puppy gaining five percent per day adds five grams — a small but meaningful amount given their size. A 400-gram large breed puppy gaining five percent adds twenty grams per day.
This is why weighing in grams rather than ounces is standard practice in serious breeding programs. Gram-level precision is not excessive — it is the only way to detect meaningful changes in small puppies.
The table below offers a rough illustration of expected weight progression, using approximate starting weights and daily gain estimates. Individual variation is wide — these are reference points, not targets.
| Breed Size | Approx. Birth Weight | Approx. Daily Gain (Week 1) | Approx. Weight at 2 Weeks |
|---|---|---|---|
| Toy | 75–150g | 5–10g/day | 150–250g |
| Small | 150–300g | 10–20g/day | 250–450g |
| Medium | 200–400g | 15–30g/day | 350–650g |
| Large | 300–600g | 25–50g/day | 550–1000g |
| Giant | 400–700g | 40–70g/day | 800–1400g |
Approximate ranges — individual breed and litter variation is significant. Healthy puppies regularly fall outside these ranges.
These numbers are approximate starting points. Actual gain rates vary by litter size, nursing effectiveness, and individual biology. A puppy consistently trending upward — even if more slowly than the estimates above — is generally doing better than one whose weight is flat or declining.
Detailed weight charts by breed size
The following tables show expected weight ranges at key milestones from birth through 8 weeks. Values are calculated using average birth weights and the 5–10% daily gain model for the first two weeks, transitioning to a linear projection toward typical 8-week weights. All figures are in grams.
Toy breeds (under 10 lb adult)
| Day | Expected Weight (g) | Minimum Healthy | Maximum for Size |
|---|---|---|---|
| Birth | 75–200 | 70 | 220 |
| Day 3 | 95–250 | 85 | 275 |
| Day 5 | 110–290 | 100 | 320 |
| Day 7 | 125–330 | 115 | 365 |
| Day 10 | 155–400 | 140 | 440 |
| Day 14 | 195–500 | 175 | 550 |
| Day 21 | 280–630 | 250 | 695 |
| Day 28 | 370–760 | 330 | 840 |
| Day 35 | 460–900 | 410 | 990 |
| Day 42 | 550–1030 | 495 | 1135 |
| Day 49 | 640–1170 | 575 | 1290 |
| Day 56 | 730–1300 | 655 | 1430 |
Approximate ranges — individual variation is significant. Consult your veterinarian for breed-specific guidance.
Small breeds (10–25 lb adult)
| Day | Expected Weight (g) | Minimum Healthy | Maximum for Size |
|---|---|---|---|
| Birth | 150–300 | 135 | 330 |
| Day 3 | 195–390 | 175 | 430 |
| Day 5 | 225–450 | 200 | 495 |
| Day 7 | 260–515 | 235 | 565 |
| Day 10 | 315–620 | 285 | 680 |
| Day 14 | 395–780 | 355 | 860 |
| Day 21 | 600–1200 | 540 | 1320 |
| Day 28 | 810–1630 | 730 | 1790 |
| Day 35 | 1015–2050 | 915 | 2255 |
| Day 42 | 1220–2470 | 1100 | 2720 |
| Day 49 | 1425–2890 | 1280 | 3180 |
| Day 56 | 1630–3310 | 1470 | 3640 |
Approximate ranges — individual variation is significant.
Medium breeds (25–60 lb adult)
| Day | Expected Weight (g) | Minimum Healthy | Maximum for Size |
|---|---|---|---|
| Birth | 200–400 | 180 | 440 |
| Day 3 | 260–520 | 235 | 570 |
| Day 5 | 300–600 | 270 | 660 |
| Day 7 | 345–690 | 310 | 760 |
| Day 10 | 420–835 | 380 | 920 |
| Day 14 | 525–1045 | 475 | 1150 |
| Day 21 | 950–2100 | 855 | 2310 |
| Day 28 | 1380–3160 | 1240 | 3475 |
| Day 35 | 1810–4215 | 1630 | 4635 |
| Day 42 | 2235–5270 | 2010 | 5795 |
| Day 49 | 2665–6325 | 2400 | 6960 |
| Day 56 | 3100–7380 | 2790 | 8120 |
Approximate ranges — individual variation is significant.
Large breeds (60–100 lb adult)
| Day | Expected Weight (g) | Minimum Healthy | Maximum for Size |
|---|---|---|---|
| Birth | 300–600 | 270 | 660 |
| Day 3 | 390–780 | 350 | 860 |
| Day 5 | 450–900 | 405 | 990 |
| Day 7 | 520–1035 | 465 | 1140 |
| Day 10 | 630–1255 | 565 | 1380 |
| Day 14 | 790–1570 | 710 | 1730 |
| Day 21 | 1580–3300 | 1420 | 3630 |
| Day 28 | 2370–5030 | 2135 | 5535 |
| Day 35 | 3165–6760 | 2850 | 7435 |
| Day 42 | 3955–8490 | 3560 | 9340 |
| Day 49 | 4745–10220 | 4270 | 11240 |
| Day 56 | 5540–11950 | 4985 | 13145 |
Approximate ranges — individual variation is significant.
Giant breeds (over 100 lb adult)
| Day | Expected Weight (g) | Minimum Healthy | Maximum for Size |
|---|---|---|---|
| Birth | 400–700 | 360 | 770 |
| Day 3 | 520–910 | 465 | 1000 |
| Day 5 | 600–1050 | 540 | 1155 |
| Day 7 | 690–1210 | 620 | 1330 |
| Day 10 | 835–1460 | 750 | 1605 |
| Day 14 | 1045–1825 | 940 | 2010 |
| Day 21 | 2080–4050 | 1870 | 4455 |
| Day 28 | 3115–6275 | 2800 | 6900 |
| Day 35 | 4150–8500 | 3735 | 9350 |
| Day 42 | 5185–10725 | 4665 | 11800 |
| Day 49 | 6220–12950 | 5600 | 14245 |
| Day 56 | 7250–15175 | 6525 | 16695 |
Approximate ranges — individual variation is significant.
Trends matter more than single readings
This is the most important concept in newborn weight monitoring, and it is worth stating plainly.
A single weight reading tells you very little. A series of readings taken at the same time each day tells you whether a puppy is trending in the right direction.
Breeders sometimes become anxious when a puppy has a flat day — a weigh-in that is the same as the previous day or even slightly lower. In isolation, this is often not meaningful. A brief plateau followed by resumed gain is common and normal.
What requires attention is a pattern — two or more consecutive days of weight loss after the initial dip, a puppy that fails to return to birth weight by day three, or a puppy whose gain is consistently and significantly behind its littermates over several days.
Context matters too. A puppy that is gaining slowly but nursing actively, staying warm, and behaving normally is in a different situation than one that is gaining slowly and also cold, lethargic, and not nursing.
Weight is one input. Behavior, warmth, nursing activity, and overall demeanor together create the full picture.
Comparing puppies within a litter
It is natural to compare puppies within the same litter, and relative size differences can be informative.
Some size variation within a litter is normal. The smallest puppy in a litter — sometimes called the runt — is not automatically at risk as long as it is nursing, gaining weight, and progressing alongside its littermates even if more slowly.
What matters is whether the gap between the smallest and largest puppy is widening over time. If the smallest puppy is consistently losing ground — falling further behind its littermates each day rather than keeping pace — that is a signal worth acting on.
In competitive nursing situations, smaller puppies may be displaced by larger ones. Monitoring individual weights, rather than assessing the litter as a group, helps identify this early.
When supplemental feeding may be needed
Weight monitoring is valuable precisely because it allows breeders to identify puppies that may need supplemental feeding before those puppies are visibly struggling.
Puppies that are gaining slowly, losing weight beyond the first day, or consistently being pushed off the nipple by larger littermates may benefit from supplemental feeding to support their intake.
Puppy milk replacer is the standard supplement, and it can be delivered by bottle, syringe, or tube depending on the puppy's strength and the breeder's experience. Tube feeding delivers nutrition efficiently and bypasses the energy cost of suckling — it is commonly used for very small or weak puppies.
Supplementing early — based on weight data — is generally more effective than waiting until a puppy shows obvious signs of distress. Weight trends provide the earliest objective signal that intervention may help.
For the full bottle/tube/stimulation workflow — formula choice, the 2-hour schedule, correct position, and how to avoid aspiration — see our pillar guide on bottle and tube feeding puppies.
How to weigh newborn puppies accurately
Consistent technique makes weight data more useful. A few practical notes on getting reliable readings. For a step-by-step walkthrough of daily weighing technique and log design, see how to track puppy weights.
Weigh at the same time each day — ideally before a feeding, so readings are not inflated by a recently nursed stomach. Morning is a common choice because it creates a consistent routine.
Use a scale that measures in grams, not ounces. For toy and small breed puppies especially, gram-level precision matters. A kitchen scale with a tare function works well — place a small bowl or container on the scale, tare to zero, and weigh the puppy in the container.
Record each puppy's weight alongside a brief note — nursing observed, supplementation given, any behavioral concern. Over several days, this creates a meaningful record rather than a series of isolated numbers.
If multiple people are involved in puppy care, establish a consistent routine so that the same person weighs at the same time whenever possible. This reduces variability and makes the data more comparable day to day.
Beyond the first two weeks
The neonatal period — roughly the first two weeks — is the most intensive monitoring phase. After this, eyes and ears open, puppies become more mobile, and the risks associated with the earliest days of life begin to decrease.
Weight monitoring remains valuable beyond the first two weeks, though daily weighing often gives way to every-other-day or weekly checks as puppies grow stronger and more independent.
The records built during the neonatal period also become a useful reference for future litters — helping breeders recognize what normal looks like for their particular dogs and establish baselines for comparison over time.
Frequently asked questions
How much should a newborn puppy weigh at birth?
Birth weight varies widely by breed size. Toy breed puppies typically weigh 75–200 grams, small breeds 150–300 grams, medium breeds 200–400 grams, large breeds 300–600 grams, and giant breeds 400–700 grams or more. What matters most is not the specific number but whether the puppy gains consistently from day two onward.
How much weight should a puppy gain per day?
Healthy puppies gain roughly 5–10% of their body weight per day during the first two weeks. Most puppies should double their birth weight by day 10–14. The key indicator is a consistent upward trend — a single flat day is normal, but two or more consecutive days of loss warrants attention.
When should I be worried about a puppy's weight?
Contact your veterinarian if a puppy loses weight for two or more consecutive days after the first 24 hours, fails to return to birth weight by day three, drops more than 10% below birth weight at any point, or falls below 75% of the average littermate weight.
What is fading puppy syndrome?
Fading puppy syndrome describes newborn puppies that appear healthy at birth but progressively weaken and die within the first two weeks. Warning signs include failure to gain weight, inability to nurse, constant crying, feeling cold to the touch, and separation from littermates. Early detection through consistent weight monitoring is the single best defense.
At what age can puppies regulate their own body temperature?
Newborn puppies cannot regulate their body temperature for approximately the first two weeks of life. The whelping area should be maintained at 85–90°F (29–32°C) during week one, gradually decreasing to 80°F (27°C) by week four. Hypothermia directly affects a puppy's ability to nurse and digest milk.
Related Tools
Sources: Merck Veterinary Manual (Neonatal Disorders of Puppies and Kittens); BSAVA Manual of Canine and Feline Reproduction and Neonatology (England GCW, von Heimendahl A eds.); Lopate C, ed. Management of Pregnant and Neonatal Dogs, Cats, and Exotic Pets (Wiley-Blackwell); Davidson AP — UC Davis canine neonatology research; Root Kustritz MV — University of Minnesota canine theriogenology; AKC Canine Health Foundation. This article is for educational purposes and does not replace professional veterinary care. If your puppy isn't gaining weight as expected, contact your veterinarian.