Daily weight is the most useful everyday indicator of a newborn puppy's health. A puppy that is gaining is usually nursing and staying warm; a puppy that is not gaining — or is losing — can signal trouble before other signs become obvious. It is an indicator, not a guarantee: a gaining puppy that is cold, limp or crying still needs the vet.
This guide gives the specific numbers breeders need: how much gain to expect by breed size, the milestones that mark healthy growth, what a normal growth curve looks like versus a concerning one, and exactly when to call the vet.
The short version
- The rule: 5–10% of body weight a day for the first two weeks (Merck) — judge the percentage, not a fixed gram number.
- Milestones: most puppies double their birth weight by day 7–10 and triple by about day 21; a puppy not doubled by two weeks is a vet check.
- Day one, then every day: a dip of up to 10% of birth weight in the first 24 hours is within normal; after that, any confirmed loss or flat day is a same-day call to your vet.
- Own birth weight, not the litter average: compare each puppy with itself; one falling behind its littermates as a share of its birth weight, day after day, needs a vet's assessment.
- How to weigh: 1-gram steps for toy and small puppies, same scale, same time, before a feed; daily for two weeks, then every three days to one month.
of body weight gained per day in the first 2 weeks
This daily percentage target applies across all breed sizes — the most reliable benchmark for neonatal growth
The rule: 5–10% of body weight a day for two weeks
Regardless of breed size, healthy neonatal puppies gain 5 to 10% of their body weight per day during the first two weeks of life. The percentage is the target because it scales with the puppy: a 100-gram Chihuahua puppy gaining 7 grams is meeting the same target as a 500-gram Labrador puppy gaining 35 grams.
Some puppies lose a little on day one; many gain from the start. A dip of up to 10% of birth weight in the first 24 hours, in a puppy that is warm and nursing, is within normal. After that, the trend should be upward every day.
The numbers behind that come from a 2023 study of 8,550 puppies followed to two months of age. Normal-birth-weight puppies still more than 8.7% under their birth weight on day two had an observed mortality of 23% over those two months, against 3.2% for the rest; for low-birth-weight puppies the dividing line was essentially no net gain by day two (−0.4%), with 37% below it and 9.2% above. Most of those deaths fell in the first three weeks.
What 5–10% a day looks like in grams, by breed size
The gram figures below are simply 5% and 10% of the typical birth weight for each size — what the rule looks like on the scale on day one. At the same percentage, a puppy that has doubled its weight has doubled its calculated gram target — so judge the percentage, not a fixed gram number. Merck's other rule of thumb is 1–3 g a day for every kilogram of expected adult weight — a puppy from a 30 kg (66 lb) breed should be adding roughly 30–90 g a day.
| Size (adult weight) | Typical birth weight | 5%/day at birth | 10%/day at birth |
|---|---|---|---|
| Toy (under 10 lb) | 75–200 g (2.6–7.1 oz) | 4–10 g | 8–20 g |
| Small (10–25 lb) | 150–300 g (5.3–10.6 oz) | 8–15 g | 15–30 g |
| Medium (25–50 lb) | 200–400 g (7.1–14.1 oz) | 10–20 g | 20–40 g |
| Large (50–90 lb) | 300–600 g (10.6–21.2 oz) | 15–30 g | 30–60 g |
| Giant (90+ lb) | 400–700 g (14.1–24.7 oz) | 20–35 g | 40–70 g |
Birth-weight ranges are the site's size-class reference, shared with the newborn puppy weight chart — a reference, not validated normal limits; healthy puppies fall outside them in both directions. Gram columns are 5% and 10% of those ranges (Merck's normal daily gain).
Milestones: most double by day 7–10, most triple by about day 21
Three milestones mark the progression of healthy neonatal growth. They describe what typical puppies do; the daily gain is what you act on.
Milestone 1: Most puppies double their birth weight by day 7–10
VCA puts it at seven to eight days for most puppies; a three-breed study measured 8.7 days in Tibetan Terriers and 10 days in Bernese Mountain Dogs. A puppy born at 300 grams is therefore usually around 600 grams somewhere in the second week.
These are typical figures, not a cut-off: the daily gain is what you act on (see below). A puppy that has still not doubled by two weeks is well behind every typical figure and should be checked by your vet.
Milestone 2: Most triple by about day 21
In the same study puppies tripled their birth weight between day 14 and day 18, so the 300-gram puppy is around 900 grams by the end of week three.
Milestone 3: Gains continue through week 4 while the percentage eases
The percentage eases as the puppy grows. A 345-puppy model of maximum growth has the relative daily gain falling from about 13% a day at birth to about 6% a day by day 21 — a description of how fast puppies can grow over the first three weeks, not a threshold. Keep weighing through week four: the daily gain is still expected every day, in grams that can hold steady or rise while the percentage keeps easing.
A healthy curve climbs every day after day one
On a chart of grams against age a healthy neonatal curve keeps climbing every day after day one. The percentage gain eases as the puppy grows, and the daily grams can rise, hold or ease a little with it — a bigger puppy gaining a smaller percentage may still add as many grams as before, or slightly fewer. The shape of the slope is not the signal; a line that goes flat or turns down is.
Scales and wriggling puppies add noise, so re-weigh once on the same scale before acting — but a confirmed loss is a loss, whatever its size.
A concerning curve: any flat day or loss after the first 24 hours
Warning signs in the growth curve include:
- Flat day — no gain on any day after the first 24 hours (re-weigh to confirm)
- Slow gain — under 5% of body weight a day in the first two weeks, even though the line is still rising
- Loss — any confirmed loss after the first 24 hours, or a puppy still under birth weight on day 2–3
- Divergence from littermates — one puppy's curve flattening while siblings continue climbing
- Not doubled by day 14 — well behind every typical figure
- Unwell — cold, limp, crying constantly or not nursing, whatever the scale says
While you are on the phone, check the basics: is the puppy warm, is it nursing and swallowing, is it being pushed off a teat? Puppies that begin losing weight can die within 48 hours if it is not reversed.
How breed size changes the numbers
All puppies follow the same general trajectory, but breed size changes the grams on the scale, the litter dynamics, and how fine a scale you need.
Toy breeds (Chihuahua, Yorkie, Maltese, Pomeranian)
- Small birth weights (typically 75–200 g — a reference, not a limit) mean tiny absolute gains — roughly 4–20 g a day at birth weight
- A scale that displays in 5-gram steps can understate or overstate a toy puppy's daily gain of a few grams — use one with 1-gram steps
- Hypoglycemia risk is elevated because these puppies have almost no fat reserves
- Growth rate per percentage is similar to larger breeds, but the margin for error is smaller — a bad nursing session represents a larger proportion of daily calories
Large and giant breeds (Labrador, Golden, German Shepherd, Great Dane)
- Higher birth weights (typically 300–700 g) mean larger absolute gains — roughly 15–70 g a day at birth weight
- Litter sizes tend to be larger, meaning more competition at the nipple and more variation within the litter
- Growth continues at a high rate for longer — large breed puppies don't reach adult weight until 12-18 months, and giant breeds until 18-24 months
- A scale in 5-gram steps is adequate for most large and giant breed neonates
Why the smallest puppy needs the most attention
In every litter, the smallest puppy faces compounding disadvantages. A lower birth weight means fewer metabolic reserves, less competitive strength at the nipple, faster heat loss due to higher surface-area-to-volume ratio, and a narrower margin between adequate and inadequate nutrition.
In a study of 4,971 puppies, very-low-birth-weight puppies had a 55% neonatal mortality rate, against 4% for normal-birth-weight puppies. “Very low” there is a study-defined, breed-specific birth-weight category — a small minority of the puppies, not simply the smallest in each litter — but it is the reason the smallest puppy gets the closest watch from hour one.
This doesn't mean the smallest puppy is doomed — many runts grow into healthy adults. But it does mean that the smallest puppy deserves more frequent monitoring and an earlier call if weight gain stalls.
A chilled puppy's gut stops moving, so milk given by bottle or tube can come back up and into the lungs. The full workflow — bottle vs tube, formula choice, the 2-hour schedule and stimulation — is in the pillar guide on bottle and tube feeding puppies; the technique walkthrough for a weak suckle reflex is in how to tube feed a puppy.
The weigh-and-supplement kit
The two things you reach for when a puppy's gain stalls — an accurate gram scale, and a milk replacer that's already in the cupboard before you need it.
Greater Goods Digital Pet Scale
Grams, hold & tareThe gram scale breeders trust for daily weigh-ins — hold and tare functions steady a squirming neonate so you can catch the 5–10% daily-gain target, or a stall, early.
PetAg Esbilac Puppy Milk Replacer Powder (12 oz)
Supplemental feedingThe best-selling puppy milk replacer for supplementing a puppy that's falling behind or a dam short on milk. Keep a tub on hand before whelping — you don't want to be sourcing it at 2 a.m. It supplements; it is not a substitute for colostrum in the first day or for veterinary care of a truly failing puppy.
More puppy milk replacers
Compare powdered and ready-to-feed formulas, bottles, and nursing kits.
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How to weigh: same time, same scale, 1-gram steps
- Weigh at the same time each day — Before the first morning feeding is ideal. Consistency in timing eliminates the variable of how recently the puppy ate
- Use the same scale — Different scales give slightly different readings. Switching between scales introduces error
- Use a scale that displays 1-gram steps for toy and small puppies (5-gram steps are fine for large and giant puppies) and gives the same reading twice for the same puppy. Grams are simpler than ounces, but the unit matters less than the step: whole-ounce steps can hide a 5–8 g gain entirely, and 5-gram steps can understate or overstate it as the reading crosses a rounding boundary — the finer the step, the truer the trend
- Record immediately — Write down or enter the weight as soon as you read it. Memory is unreliable when you're weighing 6 to 10 puppies at 2 AM
- Daily for the first two weeks, then every three days until one month; weekly after that is common practice. Twice daily for the smallest, the born-last, and any puppy that has had a wobble
The Weight Tracker makes recording and visualizing this data simple. You can see each puppy's individual trend and compare it against littermates — the kind of visual pattern recognition that catches problems early. For specific expected weight ranges by breed, see our newborn puppy weight chart.
When to call the vet: the patterns and what to do
Not every reading is a crisis, but the patterns below are. Re-weigh once on the same scale to rule out a slip, then act:
| Pattern | What it means | What to do |
|---|---|---|
| Dip in the first 24 hours, up to 10% of birth weight | Fluid loss and the move out of the womb; many puppies never dip at all | Keep it warm and nursing; expect gain from day two |
| More than 10% lost in the first 24 hours | Past the ceiling Merck calls acceptable | Call your vet today |
| No gain, or any loss, on a day after the first 24 hours | Not enough milk reaching the puppy, chilling, or illness | Re-weigh once on the same scale; if it holds, call your vet today; check warmth, latch and teat access while you wait |
| Still under birth weight on day two or three | Birth weight has not been recovered | Call your vet today |
| Cold, limp, crying constantly, or not nursing — whatever the scale says | A neonate in trouble now | Vet now; warm it gradually on the way — never feed a cold puppy |
| Gaining, but under 5% of body weight a day in the first two weeks (re-weigh to confirm) | Below Merck's normal 5–10% range for weeks 1–2 — the same problems as a flat day, earlier | Check warmth, latch and teat access today; call your vet if the next weighing is still under 5% or the puppy looks unwell |
| Gaining, but a shrinking share of its birth weight compared with littermates, day after day | Can indicate an intake problem (out-competed at the teat, a poor latch) or illness | Check its own daily gain and condition; vet assessment; supplemental feeding on your vet's plan; dedicated nursing sessions |
| Not doubled by day 14 | Well behind every typical figure (7–10 days) | Vet check |
Thresholds: Merck (a loss of at most 10% on day one, steady gain after; rewarm before feeding), VCA (any failure to gain or loss is cause for alarm — contact your vet), Mugnier 2023 (day-two lines). When in doubt, make the call early.
For a deeper dive into when weight trends signal genuine danger, see our article on when weight gain becomes a concern. And for the broader context of what happens when decline continues despite intervention, see our guide to fading puppy syndrome.
After four weeks: keep weighing through weaning
After the first four weeks the percentage gain keeps easing as puppies start on solid food, and the daily grams vary more from day to day — what should not change is the direction. Keep weighing: the weaning period (weeks 3 to 8) introduces new variables — food acceptance, digestive adaptation, and changing nutritional sources.
Continue weighing through the weaning transition. This is one of the highest-risk periods for unexpected weight loss, as puppies that don't take to solid food well may not compensate with enough nursing. See our puppy development week-by-week guide for what to expect at each stage, and our weaning guide for the transition to solid food.
For predicting where your puppy is headed based on current growth, the Adult Size Predictor uses breed and current weight data to estimate adult size.
Puppy weight gain FAQs
1How much weight should a newborn puppy gain per day?
Healthy neonatal puppies gain about 5–10% of their body weight per day during the first two weeks. At birth weight that is roughly 4–20 grams a day for a toy puppy (75–200 g at birth), 10–40 grams for a medium puppy (200–400 g) and 20–70 grams for a giant puppy (400–700 g). Those are day-one figures: at the same percentage, a puppy that has doubled its weight has doubled its calculated gram target too, so judge the percentage, not a fixed gram number. Merck's other rule of thumb is 1–3 grams a day per kilogram of expected adult weight. The percentage is the reliable target because it scales with the puppy; the gram figures are only what that percentage looks like on the scale.
2When should a puppy double its birth weight?
Most puppies double their birth weight in about 7 to 10 days: VCA puts it at seven to eight days, and a three-breed study measured 8.7 days in Tibetan Terriers and 10 days in Bernese Mountain Dogs. Those are typical figures, not a cut-off. What matters day to day is the gain itself — a puppy gaining under 5% a day, or not gaining at all, is the one to act on. A puppy that has still not doubled by two weeks is well behind every typical figure and should be checked by your vet. Most puppies triple their birth weight by about three weeks (14 to 18 days in the same study).
3Is it normal for a puppy to lose weight after birth?
Some puppies lose a little on day one; many gain from the start. A dip of up to 10% of birth weight in the first 24 hours, in a puppy that is warm and nursing, is within normal. After the first 24 hours a puppy should gain every day: any confirmed loss or failure to gain — re-weigh once on the same scale to rule out a measurement slip — is a same-day call to your vet, and so is a puppy still under its birth weight on day two or three. A puppy that is cold, limp, crying constantly or not nursing needs the vet now, whatever the scale says.
4Why is one puppy gaining slower than its littermates?
Common causes include: competition at the nipple (larger or more vigorous puppies getting the best nipples), lower birth weight putting the puppy at a disadvantage, subtle nursing difficulties like a poor latch or mild cleft palate, and positional factors during nursing. Judge each puppy against its own birth weight rather than the litter average: a small puppy gaining 8% of its weight a day is on track by weight, a big one gaining 2% is not. A puppy that keeps falling behind its littermates as a share of its birth weight, day after day, can indicate an intake problem or illness — reduced weight gain is among the possible early signs of illness in a neonate — so look at that puppy's own daily gain and condition and have your vet assess it; supplemental feeding and dedicated time on a productive teat follow the vet's plan. Never feed a cold puppy; warm it gradually first.
5What's the difference between grams and ounces for puppy weighing?
What matters is the scale's display step and repeatability, not the unit itself. A toy puppy's whole daily gain can be 5–8 grams, about 0.2–0.3 ounces: a display that rounds to whole ounces can hide that gain entirely, and a display in 5-gram steps can understate or overstate it as the reading crosses a rounding boundary, so the trend you are watching gets noisier. Grams are also simpler to read and add up. Use a scale that displays in 1-gram steps for toy and small puppies (5-gram steps are fine for large and giant puppies), check that it gives the same reading twice for the same puppy, tare a bowl or towel on it, and use the same scale and the same unit every day.
6Should I weigh puppies before or after feeding?
Weigh before feeding, at the same time each day. Weighing after feeding adds the variable of how much milk the puppy just consumed, which can vary significantly from session to session. Consistent timing — same time, before feeding, on the same scale — produces the most reliable trend data.
References & sources
- Merck Veterinary Manual. Management of the Neonate in Dogs and Cats. — Normal gain 5–10% of body weight per day; a transient loss of at most 10% of birth weight is acceptable on day 1; 1–3 g/day per kg of anticipated adult weight; weigh daily for 2 weeks, then every 3 days to 1 month; rewarm chilled neonates over 30–60 minutes and delay tube feeding until warm; reduced weight gain among the possible signs of sepsis.
- VCA Animal Hospitals. Breeding for Dog Owners — Caring from Birth to Weaning. — Most puppies double their birth weight in the first seven to eight days; a puppy that fails to gain or loses weight is cause for alarm and may die within 48 hours if not reversed.
- Schrank M, et al. Bodyweight at Birth and Growth Rate during the Neonatal Period in Three Canine Breeds. Animals 2020;10(1):8. — 213 puppies; Bernese Mountain Dogs doubled birth weight at 10.0 days and tripled at 17.9; Tibetan Terriers at 8.7 and 14.3 days; no weight loss in the first 48 hours in either breed.
- Alves I. A model of puppy growth during the first three weeks. Vet Med Sci 2020;6(4). — 345 puppies, 19 breeds; a model of maximum growth with relative daily gain falling from about 13% at birth to about 6% at day 21; weigh daily for two weeks, then at least every 3 days to one month.
- Mugnier A, Gaillard V, Chastant S. Relative Impact of Birth Weight and Early Growth on Neonatal Mortality in Puppies. Animals 2023;13(12):1928. — 8,550 puppies followed to two months; birth-to-day-2 growth lines of −8.7% (normal birth weight) and −0.4% (low birth weight) separated the highest-mortality subgroups.
- Mugnier A, et al. Low and very low birth weight in puppies: definitions, risk factors and survival in a large-scale population. BMC Vet Res 2020;16:354. — 4,971 puppies; neonatal mortality 4.2% (normal), 8.8% (low), 55.3% (very low birth weight).
- 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); Hand MS et al. Small Animal Clinical Nutrition (Mark Morris Institute) — background texts, not linked.
Daily-gain targets reflect classical neonatology guidance and vary with breed size, litter size, and individual puppy. This article is for educational purposes and does not replace professional veterinary care.