What should a toy-breed puppy weigh at each age? A toy-breed puppy typically weighs 1–5 kg as an adult, and it grows along a rough curve to get there: about a fifth to a quarter of its adult weight at 8 weeks, about half to two-thirds at 6 months, and about four-fifths or more at 12 months, when it is near-adult if it is a small breed and still growing if it is a large one. This guide is the toy-breed puppy weight chart by age, plus how to use it, how to weigh a puppy, and when a puppy that is off the chart needs a vet. Every figure is a very rough guide, because individual puppies vary widely.
The short version is: weigh the puppy every two weeks, compare with the breed's expected adult weight of 1–5 kg, and look for a smooth, steady rise — not a flat line and not a sudden jump. A toy-breed puppy finishes growing at about 9 to 12 months. The puppy weight predictor estimates adult weight from the puppy's current weight and age, and the puppy weight calculator by breed size guide explains how to track growth against the breed's expected adult weight.
Toy-breed puppy weight chart by age
The table below gives the very rough weight for a toy-breed puppy at each age, as a share of its expected adult weight of 1–5 kg. The shares are rough, not measurements from a study of individual breeds — use them to check whether your puppy is broadly on track, not to judge it to the gram. Example toy breeds are Chihuahua, Pomeranian, Yorkshire Terrier.
| Age | Share of expected adult weight (very rough) | Weight for a toy-breed puppy |
|---|---|---|
| 8 weeks | a fifth to a quarter | 0.2–1.2 kg |
| 3 months | a quarter to a third | 0.2–1.7 kg |
| 4 months | a third to two-fifths | 0.3–2.0 kg |
| 6 months | half to two-thirds | 0.5–3.4 kg |
| 9 months | three-quarters to four-fifths | 0.8–4.0 kg |
| 12 months | four-fifths or more | 0.8–4.8 kg |
| 18 months | near adult | 0.9–5.0 kg |
Read the table from top to bottom and the pattern is clear: a toy-breed puppy grows fastest in the first few months, then slows down towards the end of its first year. A puppy that is well outside the rough share for its age — much heavier or much lighter than the table suggests — should be checked by a vet, rather than having its food changed on your own. The puppy weight chart by age guide gives the same shares for all sizes, and the how much food should a puppy eat guide gives the calorie tables.
How a toy-breed puppy grows
A toy-breed puppy does not grow evenly: it grows fastest in the first few months, then slows down. In the first weeks, a puppy should gain weight every day — a newborn puppy that is not gaining weight needs a vet check, not just more food. By 8 weeks, a toy-breed puppy is about 0.2–1.2 kg, by 6 months about 0.5–3.4 kg, and by 12 months about 0.8–4.8 kg, when it is near-adult. A toy-breed puppy finishes growing at about 9 to 12 months.
Those shares are very rough, and individual puppies vary widely — a puppy that is a little above or below the share for its age is usually fine, as long as it is gaining weight steadily and is bright, eating, and active. What matters is the line over weeks: a smooth, steady rise. A puppy that is not gaining weight at all over two weeks, or that is losing weight, needs a vet check. A puppy that is gaining weight in sudden jumps may be overfed, and a puppy that is gaining weight very slowly may be underfed or unwell. The puppy growth chart by breed size guide gives the growth tables by size, and the when is a dog fully grown guide gives the growth ages by size and breed.
How to weigh a toy-breed puppy and track its growth
Weigh the puppy every two weeks, at the same time of day, on the same scales, and write the number down — the line over weeks is what matters, not any single reading. For a small puppy, step on the bathroom scales holding it, then step on without it, and take the difference. For a larger puppy, use the vet's scales at a routine visit. Plot the weights on a simple chart, or just keep a list with dates: what you are looking for is a smooth, steady rise, not a flat line and not a sudden jump.
Feel the ribs at every weigh-in: you should feel them easily under a thin layer of fat, and see a waist from above and from the side, even in a puppy. A puppy that is too fat is not a healthy puppy: excess weight in youth sets up weight problems for life, and in a large-breed puppy it strains developing joints. A puppy that is too thin is not a healthy puppy either: it may not be getting enough food, or it may be unwell. The table above gives the rough shares; the scales and your hands tell you whether the puppy is on track. The how much food should a puppy eat per day by weight guide gives the calorie tables by weight.
Feeding a toy-breed puppy
Feed a complete and balanced puppy food, measured with scales or a measuring cup, split into three or four meals a day until about six months, then two meals a day. A puppy over four months old needs about 2.0 times its resting energy requirement (RER), and a puppy under four months needs about 3.0 times RER, where RER equals 70 times body weight in kg to the power of 0.75. Use the calorie table for the puppy's weight, not the adult table, and re-check every two weeks as the puppy grows — the amount that was right a month ago is already wrong.
A small-breed puppy grows fast and finishes growing early, so its food needs change quickly — re-check the amount every two weeks, and switch to adult food when the puppy is fully grown, at about 9 to 12 months for a toy breed and about 12 months for a small breed. The best food for small breed puppies guide explains the choice, and the how often should you feed a puppy guide gives the feeding schedule.
When a toy-breed puppy's weight needs a vet
See a vet promptly if the puppy is not gaining weight over two weeks, if it is losing weight, if it is much heavier or much lighter than the rough share for its age, if it is lethargic or off its food, or if it has vomiting or diarrhoea. A puppy that is not growing needs a vet, not just more food — parasites, infections, and other problems can all slow growth, and they need treating. Bring the weight record: a list of weights with dates is far more useful to a vet than a single number, because it shows the line over weeks.
Do not try to make a puppy grow faster with extra food: rapid growth and excess weight strain developing joints, and in a large-breed puppy that matters more than in a small one. Do not try to slow a puppy's growth with less food either: a puppy that is underfed will grow more slowly than it should, and it needs a vet check, not a smaller portion. The puppy too skinny — what to do guide covers a puppy that is too thin, and the joint problems in large breed puppies guide covers the joint risks of fast growth in large breeds.
For related reading, see the puppy weight predictor, the puppy weight calculator by breed size guide, the puppy weight chart by age guide, the how much food should a puppy eat guide, the puppy too skinny — what to do guide, the when is a dog fully grown guide.
Frequently asked questions
How much should a toy-breed puppy weigh at 8 weeks?
As a very rough guide, about a fifth to a quarter of its expected adult weight of 1–5 kg — so about 0.2–1.2 kg at 8 weeks. Those are rough shares, not measurements — individual puppies vary widely, and the line over weeks matters more than any single reading.
How much should a toy-breed puppy weigh at 6 months?
As a very rough guide, about half to two-thirds of its expected adult weight — so about 0.5–3.4 kg at 6 months. Small breeds are nearer adult at 6 months than large breeds, which keep growing for longer.
When is a toy-breed puppy fully grown?
A toy-breed puppy finishes growing at about 9 to 12 months. Growth finishes at different ages for different sizes, so a puppy that is still growing should stay on puppy food, even if it has passed 12 months — and a puppy that has finished growing should switch to adult food.
How often should I weigh my puppy?
Every two weeks, at the same time of day, on the same scales, and write the number down. A puppy grows fast, and the amount of food changes quickly, so a puppy weighed once a month is being weighed too rarely.
My puppy is not gaining weight — what should I do?
See a vet promptly. A puppy that is not gaining weight over two weeks, or that is losing weight, needs a vet check — parasites, infections, and other problems can all slow growth, and they need treating. Do not just feed more: a puppy that is not growing needs a vet, not just more food.
Can a toy-breed puppy be overweight?
Yes — a puppy that is too fat is not a healthy puppy. Excess weight in youth sets up weight problems for life, and in a large-breed puppy it strains developing joints. Feel the ribs at every weigh-in: you should feel them easily under a thin layer of fat, and see a waist from above and from the side, even in a puppy.
Results on this page are estimates for general information only and are not veterinary advice. If your pet is ill, underweight, overweight, pregnant, or has a health condition, consult your veterinarian before changing diet or care.