How Much Should I Feed My Dog?
If you've ever stood in the kitchen holding a scoop, squinting at the feeding chart on the back of the bag, and thought "...is this actually right?" — you're asking the right question.
Here's the honest answer most people don't hear: the number on the bag is a starting point, not a prescription. Those charts are built for a broad average and tend to run a little generous. Two dogs of the same weight can need noticeably different amounts depending on age, activity, and whether they've been spayed or neutered. So the bag gets you in the ballpark — your job is to land on the right number from there.
It's not complicated. It just takes a starting estimate and one simple feedback loop.
Why "just follow the bag" doesn't quite work
A feeding chart only knows one thing about your dog: roughly how much they weigh. But the right portion depends on several things it can't see:
- Age — puppies need far more calories per kilo than adults; seniors usually need fewer.
- Activity level — a dog hiking every day and a dog who naps on the couch are not the same order.
- Spayed/neutered — this lowers calorie needs, often by a meaningful amount.
- The food itself — calorie density varies a lot between brands and formulas. "One cup" of one food is not the same as a cup of another.
That last one trips people up most. Always feed by the calories and the weight on the label, not by an eyeballed scoop. Which brings us to the single cheapest upgrade you can make.
Tip #1: weigh the food, don't scoop it
A kitchen scale is the most underrated dog-care tool there is. "A cup" can vary by 20–30% depending on how you scoop and how the kibble settles — and over a year, that drift is exactly how dogs quietly gain or lose weight.
Weigh the daily amount in grams once, note it, and you've removed the biggest source of error. You don't have to weigh every meal forever — just calibrate your scoop against the scale so you know what "right" looks like.
Tip #2: get a starting number, then stop guessing
You can do the math by hand (vets use a formula based on resting energy needs and an activity multiplier), but you don't have to. The faster route: enter your dog's weight and food type into a free pet food calculator and you'll get a daily gram estimate — no signup needed. That's your day-one portion.
A couple of ground rules on top of the number:
- Split it into meals. Most adult dogs do well on two meals a day; puppies need 3–4 at first.
- Treats count. Treats, chews, and "just a bite" of your dinner should stay under about 10% of daily calories — and they come out of the total, not on top of it. This is the most common reason a carefully measured dog still gains weight.
Tip #3: the feedback loop that actually keeps it right
Here's the part that matters more than any starting number: a portion isn't "set and forget." Your dog changes — they grow, slow down, get more or less active with the seasons — and the right amount changes with them. The way you keep up is a simple loop you run every couple of weeks:
- Check body condition. Run your hands over the ribs (you should feel them easily, like the back of your hand, without pressing). Look from above for a waist, and from the side for a tucked-up tummy. If you've never scored it, this body condition score guide walks through it in a minute.
- Glance at the weight trend. Weigh every week or two and watch the direction, not the single number.
- Adjust by about 10%. Ribs getting hard to feel and no waist? Trim the portion ~10% and recheck in two weeks. Ribs too sharp, energy dipping? Add ~10%.
That's the whole system. Body condition is the truth; the scale and the bag are just instruments. When they disagree, trust your hands.
A few special cases
- Puppies: feed for the adult they'll become, in 3–4 meals, and expect to adjust often as they grow. (We covered the full first-month playbook in a separate piece.)
- Multiple dogs: don't free-feed from one bowl — you lose all control over who eats what. Separate, measured meals.
- Weight loss on purpose: go slow. Crash diets are as bad for dogs as for people; aim for gradual change and loop in your vet for a target.
- When in doubt, ask your vet. A calculator and a body-condition check handle the everyday case well, but your vet should set the target for a dog who's significantly over- or underweight, pregnant, or managing a health condition.
The short version
Getting your dog's portion right isn't about finding one magic number. It's three habits:
- Weigh the food instead of eyeballing it.
- Start from a real estimate (a calculator or your vet), not just the bag.
- Run the feedback loop — body condition + weight trend, adjust by ~10%.
Full disclosure: keeping that loop going — the weekly weigh-in, the portion that quietly needs nudging — is exactly the kind of thing that slips, which is why we built a small free app for it, PetCare. It logs weight, tracks body condition, and keeps your pet's records in one place. The food calculator and body-condition guide linked above are free and need no signup — use them on their own if that's all you need.
Whatever tools you use, the principle is the same: start from a real number, then let your dog's body tell you whether to nudge it up or down. Do that, and "how much should I feed my dog?" stops being a guess.
Quick feeding checklist
- Weigh food in grams; calibrate your scoop once
- Get a starting daily amount from a calculator or your vet
- Split into 2 meals (adults) / 3–4 (puppies)
- Keep treats under ~10% of daily calories — and subtract them from the total
- Every 1–2 weeks: body-condition check + weight trend
- Off target? Adjust by ~10% and recheck in two weeks
- Big weight problems, pregnancy, or illness → set the target with your vet