How Much Should I Feed My Dog? A No-Nonsense Portion Guide by Weight and Age

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Most owners aren’t feeding the wrong food. They’re feeding the right food in the wrong amount — usually a scoop that was never actually measured against anything, eyeballed by whoever fed the dog that morning. It adds up slowly, which is exactly why nobody notices until the vet mentions it at the annual check-up.

If you haven’t settled on a food yet, start with our best dry dog food overall guide — but if the food’s already in the cupboard and you just need the actual numbers, here’s how to work them out properly.

So how much should I actually be feeding my dog?

Quick answer
Most adult dogs need roughly 25–30 calories per pound of body weight per day, adjusted up for active dogs and down for less active or overweight ones. Every bag has a feeding chart by weight — treat it as a starting point, not gospel, and adjust based on your specific dog’s body condition over a few weeks.

The feeding chart on the bag is calculated for an average dog at an average activity level — which is to say, a dog that doesn’t exist. A working farm dog and a couch-based senior of the same weight have wildly different calorie needs. Start at the chart’s recommendation, then check body condition every couple of weeks and adjust up or down by roughly 10%.

The rib test: the fastest way to check if you’re feeding the right amount

Quick answer
Run your hands along your dog’s ribcage with light pressure. You should be able to feel individual ribs without pressing hard, and see a visible waist from above. Ribs you can’t feel at all usually mean overfeeding; ribs that are sharply visible usually mean underfeeding.

This is more reliable than the scale alone, because “normal weight” varies enormously by breed and build. A lean, muscular Greyhound and a naturally stocky Bulldog can both be at a perfectly healthy weight while looking completely different on a scale relative to breed averages. The rib test works regardless of breed.

How to check body condition, step by step

• Stand your dog and run flat hands gently along both sides of the ribcage
• You should feel ribs with light pressure — not see them, but feel them easily
• Look from above: there should be a visible waist narrowing behind the ribs
• Look from the side: there should be a slight upward tuck from chest to belly
• No waist and no rib feel = reduce portions; visible ribs and sharp waist = increase them

Puppies, seniors, and everything in between

Quick answer
Puppies need more calories per pound than adults and should be fed by growth-stage chart, not adult guidelines. Senior dogs typically need fewer calories as metabolism slows, even if activity level stays similar. Both deserve a life-stage-specific formula rather than adult maintenance food stretched to fit.

Growing puppies need portions recalculated roughly monthly as they gain weight — our puppy food guide covers what to feed and how portions shift through the growth stages.

On the other end, senior dogs often need fewer calories even at the same activity level, since metabolism naturally slows with age — our guide to food for senior dogs covers the specific shifts worth making.

Measuring properly: why the scoop in the bag lies to you

Quick answer
The scoop that comes with a bag of food is not a standardized measuring cup — it varies by brand and often doesn’t match an actual cup measurement. Use a real measuring cup or, better, a kitchen scale for accuracy, especially for small dogs where a 20-gram error is a much bigger percentage of their daily intake.

This is the mistake behind most “slow, silent” weight gain. A scoop that’s supposed to be one cup but is actually closer to one and a quarter doesn’t feel like much per meal — but multiplied across a year, it’s a meaningful calorie surplus. This matters just as much whether you’re feeding dry kibble or comparing against wet food portions, since wet food’s calorie density per cup is usually lower and easy to miscalculate if you’re used to dry measurements.

Weigh the “scoop” against an actual measuring cup once, just once, and you’ll likely have a what the furry moment of your own — most owners discover they’ve been overfeeding by 15 to 20% without realizing it, simply because the free scoop that came in the bag was never a real unit of measurement to begin with.

Frequently asked questions

Should I feed my dog once or twice a day?

Twice daily is generally better than once for most adult dogs — it keeps blood sugar and energy more stable and reduces the risk of bloat in deep-chested breeds. Puppies typically need three to four smaller meals a day up to about six months old.

Is it okay to free-feed (leave food out all day)?

It’s the leading cause of unnoticed overfeeding, since it removes any sense of portion control. Scheduled meals also make it much easier to notice if your dog suddenly stops eating — an early sign of illness that’s easy to miss with a bowl that’s always full.

My dog is always begging for more — are they actually hungry?

Usually not, if they’re at a healthy weight and being fed an appropriate amount. Dogs are opportunistic eaters by nature and will beg regardless of fullness. Trust the rib test and body condition over apparent hunger cues.

Portion size matters as much as the food itself

The best food on the market still causes weight problems if the amount is wrong. Get an actual measuring cup or a kitchen scale, check body condition every few weeks rather than relying purely on the bag’s chart, and adjust as your dog’s age and activity level change. It takes five minutes a month and prevents a slow drift that’s much harder to reverse later.

Related articles → Best dry dog food in 2026: the full guide → Best dog food for puppies → Best dog food for senior dogs → Wet vs dry dog food: the honest verdict