How much food should a small dog eat? A small dog weighs 5 to 10 kg, so a typical neutered adult needs roughly 290 to 490 calories a day — more than a toy dog, but still a small amount where a careless scoop makes a real difference. This guide is the small dog food calculator in words: the RER formula, the calorie table for small dogs at 5, 7, and 10 kg, cups and grams per day, feeding by life stage, and the mistakes that most often lead to an overweight small dog.
Small breeds covered here include Miniature Poodles (typically 7–8 kg), Dachshunds (7–14 kg), Cavalier King Charles Spaniels (6–8 kg), Miniature Schnauzers (5–9 kg), Shih Tzus (4–7 kg), Boston Terriers (7–11 kg), Havanese (3–6 kg), Pugs (6–8 kg), Shiba Inus (8–11 kg), Bichon Frises (5–8 kg), Lhasa Apsos (6–8 kg), Scottish Terriers (8–10 kg), West Highland White Terriers (7–10 kg), Jack Russell Terriers (6–8 kg), and the smaller terriers in this batch — Parson Russell Terriers (6–8 kg), Rat Terriers (5–11 kg), Cairn Terriers (6–8 kg), Norwich Terriers (5–6 kg), Norfolk Terriers (5–6 kg), and Border Terriers (5–7 kg). The figures below are ranges and starting points, not prescriptions — always adjust by body condition and your vet's advice.
How many calories does a small dog need?
Veterinary nutritionists start with the resting energy requirement, or RER — the calories a dog burns at rest in a neutral temperature, doing nothing at all. The formula is:
RER = 70 × (body weight in kg)^0.75
For a 7 kg small dog, the RER is 70 × 7^0.75 ≈ 301 calories a day. Daily needs are then the RER multiplied by a factor for life stage and activity: about 1.6 for a typical neutered adult, about 1.8 for an intact adult, about 2.0–3.0 for a very active or working dog, about 2.0 for a puppy over four months old (and about 3.0 under four months), and about 1.2–1.4 for a senior or a dog that needs to lose weight. So a typical neutered adult small dog of 7 kg needs about 480 calories a day, while the same dog doing long daily runs or working all day could need about 660.
These factors are the standard ones used in veterinary nutrition, but they are still starting points. A small dog that is mostly a couch companion in a flat needs less than one that hikes for two hours a day, and a dog that has been neutered typically needs about 10–20% fewer calories than before. The right amount is the one that keeps weight steady: weigh the dog monthly, and if weight drifts up, cut food by about 10% and re-weigh in a month rather than changing everything at once. The dog food calculator works the same calculation out for any weight, and the small dog age guide explains the life stages the amounts below are built around.
Small dog daily calories by weight
| Body weight | Neutered adult (×1.6) | Intact adult (×1.8) | Active dog (×2.2) | Senior / weight loss (×1.3) |
| --- | --- | --- | --- | --- |
| 5 kg | 375 | 420 | 515 | 305 | | 7 kg | 480 | 540 | 665 | 390 | | 10 kg | 630 | 710 | 865 | 510 |
Use the row nearest your dog's weight, then pick the column that matches the dog's life. A puppy's row is different — see the life-stage section below — and a pregnant or nursing small dog needs considerably more, which your vet should set individually. If your dog is between two rows, take the lower figure first: it is easier to add food to a dog that is losing weight than to take weight off a dog that has gained it, and small dogs gain weight easily when food is guessed rather than measured.
Note that calories are the real target and cups are only a translation. Different foods have very different calorie densities, so always check the kcal per cup or per 100 g on your own bag or tin and work from that. The cups figures below assume a typical dry food at around 350 kcal per cup — a common figure, but your food may differ by a wide margin, and the bag's number always wins over this guide's.
How much food in cups and grams per day
| Body weight | Calories (neutered adult) | Cups of dry food per day | Grams of dry food per day |
| --- | --- | --- | --- |
| 5 kg | 375 kcal | 1.1 cups | 107 g | | 7 kg | 480 kcal | 1.4 cups | 137 g | | 10 kg | 630 kcal | 1.8 cups | 180 g |
Split the daily amount into two meals for an adult small dog — morning and evening — rather than one large meal. Two smaller meals are easier on digestion and reduce the risk of the dog eating too fast and then being uncomfortable. If you feed wet food, use the tin's kcal figure to convert: a typical wet food is around 70–100 kcal per 100 g, so a 7 kg small dog needing 480 calories would need roughly 565 g of wet food a day, split across meals. Mixed feeding is fine as long as the total calories add up — the common mistake is to give a full measure of dry food plus a full tin of wet food, which roughly doubles the ration.
Measure food with scales or a measuring cup, not a mug or a handful. A small dog's whole daily ration may be only 140 g of dry food — a scoop error of 20 g is a seventh of the day's food. Weigh the daily amount once, note what it looks like in your cup, and use that cup every time. Treats count too: they should stay under 10% of daily calories, which for a 7 kg small dog is under about 50 calories of treats a day — a few small training treats, not a handful of biscuits. The treat calorie calculator helps you stay inside that budget, and the feeding schedule generator builds a timetable from your dog's age and size.
Feeding a small dog by life stage
Puppy (up to about 12 months). A small puppy grows fast and needs a puppy food — one labelled complete and balanced for puppies or for all life stages — fed in three to four meals a day until about six months, then two meals a day. Use the ×2.0 factor (×3.0 under four months) on the RER at the puppy's current weight, and re-weigh every two weeks, because the amount changes quickly as the puppy grows. Do not overfeed a puppy to make it grow faster: rapid growth and excess weight strain developing joints, and the puppy should stay lean enough that you can feel its ribs easily. The puppy feeding schedule guide covers the schedule in detail.
Adult (about 1 to 10 years). Two meals a day, a complete adult food, measured amounts, and a monthly weigh-in. This is the stage where weight most often creeps up, because the dog has stopped growing but the owner keeps feeding puppy amounts, or because exercise drops while food stays the same. If your small dog is neutered, expect to cut food by roughly 10–20% after the operation and watch the waistline for the next few months.
Senior (from about 10 to 11 years). Older small dogs often need fewer calories — the ×1.2–1.4 range — because they move less, but they still need good protein to hold muscle. A senior food, or an adult food fed in a smaller amount with your vet's agreement, is usually right. Some seniors develop kidney or other health issues that change the diet entirely, which is a vet decision, not a food-brand decision. Small breeds are prone to dental disease, so a sore mouth can make a senior eat less — check the teeth before changing the food. The senior dog diet guide covers the senior stage in detail.
Common feeding mistakes with small dogs
The most common mistake is free-feeding — leaving a full bowl down all day. It makes it impossible to know how much the dog has eaten, it hides appetite changes that are often the first sign of illness, and it is the fastest route to an overweight small dog. The second is feeding by the bag's chart alone: bag charts are generous, because they are written for active dogs and rounded up, so treat them as a maximum, not a target. The third is treat creep: a biscuit here, a piece of cheese there, and the dog's daily calories rise by a quarter without anyone noticing.
The fourth is table scraps, which are often fatty, salty, or simply too many calories, and which teach begging. The fifth is switching foods suddenly, which upsets digestion — change foods gradually over a week, mixing the old and new in increasing proportions. And the sixth, specific to small dogs, is assuming a small dog needs little exercise and therefore little food discipline: small dogs still need daily walks, play, and training, and a small dog that never leaves the house loses muscle while its food stays the same — the worst combination for weight.
Foods a small dog should never eat
Some everyday foods are toxic to dogs and should never be given, in any amount: chocolate, cocoa, and coffee; grapes and raisins; onions, garlic, leeks, and chives; xylitol (birch sugar, found in some sugar-free gum, sweets, and peanut butter); macadamia nuts; alcohol; and cooked bones, which can splinter. For a small dog the danger is greater than for a large dog, because a small amount is a large dose relative to body weight. If your small dog eats any of these, call your vet or an animal poison line straight away — do not wait for symptoms and do not try to treat it at home. Keep a note of what was eaten, how much, and when, because the vet will ask.
Choosing a food for a small dog
Look for a food labelled complete and balanced for the dog's life stage, ideally a small-breed formula with kibble sized for a small mouth, from a manufacturer that employs veterinary nutritionists and runs feeding trials — the label and the company's transparency matter more than the marketing on the front of the bag. Price is not a reliable guide to quality, and neither is the ingredient list alone: what matters is the nutrient profile and whether the food suits your individual dog's digestion, coat, weight, and energy. If your small dog has a health condition, ask your vet or a veterinary nutritionist before choosing a special diet — therapeutic diets are medicines in food form and should not be chosen by guesswork. The Dachshund food guide and the Jack Russell Terrier food guide show how the same method applies breed by breed.
For related reading, see the dog food calculator, the small dog age calculator guide, the small dog ideal weight guide, the Dachshund food guide, the Jack Russell Terrier food guide, the puppy feeding schedule guide.
Frequently asked questions
How much food should a small dog eat per day?
A typical neutered adult small dog of 7 kg needs about 480 calories a day, which is roughly 1.4 cups or 137 g of a typical dry food at 350 kcal per cup. At 5 kg the figure is about 370 calories, and at 10 kg about 640. Adjust by body condition and your vet's advice — active, intact, puppy, and senior dogs all differ.
How many times a day should I feed a small dog?
Two meals a day for an adult small dog, morning and evening. Puppies need three to four meals a day until about six months, then two. One large meal a day is not ideal, and free-feeding — leaving food down all day — makes portion control and appetite monitoring much harder.
How many calories does a small dog puppy need?
Use the RER formula with a factor of about 3.0 for puppies under four months and about 2.0 from four months to adulthood, applied to the puppy's current weight and re-checked every two weeks as the puppy grows. A puppy food labelled complete and balanced is the right base.
How do I know if my small dog is overweight?
Feel the ribs: you should feel them easily under a thin layer of fat without pressing hard. Look from above for a visible waist behind the ribs, and from the side for a tummy tuck. If you cannot feel the ribs or there is no waist, the dog is probably overweight — cut food by about 10% and ask your vet to set a target weight. The small dog ideal weight guide gives the weight targets.
Can a small dog eat raw food?
Raw diets are possible but need care: they must be complete and balanced, handled hygienically, and agreed with your vet, because an unbalanced raw diet can cause deficiencies and raw meat carries bacteria that can affect dogs and people in the house. The raw food calculator gives portion guidance, but it does not replace veterinary advice.
What foods are toxic to a small dog?
Chocolate, grapes and raisins, onions and garlic, xylitol, macadamia nuts, alcohol, and cooked bones are all dangerous for dogs — and more dangerous for a small dog, because a small amount is a large dose for a 5–10 kg body. If your small dog eats any of them, call your vet or an animal poison line immediately.
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.