How Much Should You Feed Your Dog? A Practical Guide by Size and Age

Portion sizes depend on your dog's weight, age and activity level. Here is how to work out a sensible starting amount and adjust it over time.

Feeding the right amount is one of the simplest ways to keep a dog healthy, yet it is also one of the most common sources of confusion. The numbers printed on a bag of food are a starting point, not a rule. Every dog burns energy differently, and the right portion for a lazy senior Labrador is very different from what a young working Border Collie needs.

This guide explains how to choose a sensible starting portion, how to tell whether it is working, and when to talk to your vet.

Start with the feeding guide on the label

Commercial dog foods are formulated to be complete and balanced, and the manufacturer’s feeding table is based on the calorie content of that specific recipe. Two foods that look similar can differ by 20 to 30 percent in calories per cup, so never assume the portion from your old brand carries over to a new one.

Look for the daily amount listed for your dog’s ideal weight, not their current weight if they are overweight. Then divide that daily total into meals.

How many meals a day?

  • Puppies under 6 months: three to four small meals a day. Their stomachs are small and they need steady energy for growth.
  • Puppies 6 to 12 months: usually two to three meals.
  • Adult dogs: two meals a day works well for most dogs. It keeps hunger steady and reduces the chance of gulping food.
  • Large, deep-chested breeds: splitting food into at least two meals and avoiding vigorous exercise right after eating is often recommended to lower the risk of bloat.

Adjust for activity and life stage

The label assumes an average, moderately active pet. Adjust from there:

  • Very active or working dogs may need 20 to 40 percent more.
  • Neutered or less active dogs often need around 10 to 20 percent less.
  • Senior dogs tend to slow down and usually need fewer calories, though some lose weight with age and need more.
  • Pregnant or nursing dogs have much higher needs and should be fed under veterinary guidance.

Use body condition, not the bowl, as your guide

The most reliable way to know whether you are feeding the right amount is to look at and feel your dog. A dog in good condition has:

  • Ribs you can feel easily with light pressure, without a thick layer of fat.
  • A visible waist when you look down from above.
  • A slight tuck of the belly when viewed from the side.

If you cannot feel the ribs, reduce the daily amount by about 10 percent and check again in two to three weeks. If the ribs, spine and hip bones are very prominent, increase slightly and speak to your vet to rule out a medical cause.

Do not forget treats

Treats, chews and table scraps add up quickly. A common guideline is to keep treats under about 10 percent of daily calories. If you train with food, set aside part of the daily kibble to use as rewards, or choose very small, low-calorie treats.

Measure every time

Scooping by eye is how many dogs slowly gain weight. Use a proper measuring cup or, even better, a kitchen scale. Weighing food is more accurate because kibble size and density vary.

Weigh your dog regularly

Small dogs can be weighed by stepping on a bathroom scale while holding them, then subtracting your own weight. For larger dogs, many vet clinics and pet shops let you use their scale for free. Checking once a month helps you spot slow changes before they become a problem.

When to talk to your vet

Contact your vet if your dog suddenly loses or gains weight without a change in diet, stops eating for more than a day, drinks much more water than usual, or has ongoing vomiting or diarrhoea. These can be signs of an underlying health issue rather than a feeding problem.

The bottom line

Start with the label amount for your dog’s ideal weight, split it into sensible meals, count the treats, and adjust in small steps based on body condition. A few minutes of attention each month is enough to keep most dogs at a healthy weight for life.

Quick answers

Should I follow the feeding guide on the bag? Use it as a starting point, then adjust based on your dog’s body condition, activity level and age. Many guides are generous, and individual needs vary.

How can I tell if my dog is a healthy weight? You should be able to feel the ribs easily without pressing hard, see a waist from above and see a slight tuck from the side. Your vet can help assess body condition.

Do treats count? Yes. Treats should make up no more than about 10% of daily calories. If you use a lot of treats for training, reduce meal portions slightly.

Is it better to feed once or twice a day? Most adult dogs do well on two meals a day. Puppies usually need three or four smaller meals.

When should I talk to a vet? Speak to your vet before making big diet changes, if your dog suddenly gains or loses weight, or if your dog has a medical condition that may need a special diet.

Related reading