When I arrive at a new client's home for a sitting job, one of the first things I check is the feeding instructions. And I'll tell you — the range of what I see is remarkable. Some owners leave precise, laminated feeding charts. Others leave a bag of food with a sticky note that says "a scoop."
Over the years I've cared for hundreds of dogs, and I've seen both ends of the spectrum: dangerously underweight dogs and dogs so obese they couldn't walk up the driveway without stopping to rest. Both are usually the result of good intentions paired with genuinely confusing information. The bag guidelines are often wrong. The internet is full of contradictions. So let me give you the practical breakdown.
Every bag of dog food has a feeding chart on the back. I always recommend owners use it — but understand that it's a starting point, not a prescription. Those guidelines are typically set for moderately active dogs at an average weight. They also tend to run on the high side, because pet food companies aren't losing business by having you use more food.
Your dog's actual needs depend on their age, metabolism, activity level, whether they're spayed/neutered (which reduces caloric needs by 20–30%), and their body condition. Two 40-pound dogs can have very different caloric requirements.
| Dog Weight | Low Activity | Normal Activity | High Activity |
|---|---|---|---|
| 10 lbs | ¼ cup | ⅓ cup | ½ cup |
| 20 lbs | ½ cup | ⅔ cup | ¾ cup |
| 30 lbs | ¾ cup | 1 cup | 1¼ cups |
| 50 lbs | 1¼ cups | 1½ cups | 1¾ cups |
| 70 lbs | 1¾ cups | 2 cups | 2½ cups |
| 90 lbs | 2¼ cups | 2¾ cups | 3¼ cups |
These are estimates for standard dry kibble at approximately 350–400 calories per cup. Calorie density varies significantly between brands — always check the label.
Here's what I actually use when I'm checking on a dog I care for regularly: the body condition score (BCS). It's a 1–9 scale vets use to assess whether a dog is underweight, ideal, or overweight. You don't need a vet to do it — you can check it yourself right now.
Puppies need 2–4x more calories per pound of body weight than adult dogs. They also need to be fed more frequently — 3 to 4 times per day for young pups, reducing to twice daily by 6 months. Never free-feed a puppy. Controlled portions help with house training and prevent overeating that can cause joint problems in large breeds.
Twice-daily feeding is ideal for most adult dogs. It keeps blood sugar more stable than once-a-day feeding and reduces the risk of bloat in deep-chested breeds. For the table above, divide the daily amount into two equal meals.
Senior dogs are typically less active and have a slower metabolism, so they need fewer calories. However, they also often have more difficulty maintaining muscle mass, so protein quality becomes more important than quantity. Look for senior formulas that are lower in calories but higher in quality protein. Many of my senior client dogs also benefit from joint supplements added to their food — I usually see glucosamine and fish oil on the counter.
Leaving a bowl of food out continuously works fine for some self-regulating dogs — usually cats, not dogs. Most dogs will eat until the bowl is empty regardless of hunger. Free feeding makes it impossible to monitor intake and is one of the leading contributors to dog obesity I see in my work.
This is the most common one. An owner carefully measures their dog's kibble, then gives them 8 training treats, a dental chew, a piece of toast, and half a banana over the course of a day. Treats should make up no more than 10% of your dog's daily caloric intake — and it adds up faster than you'd think.
After spaying or neutering, most dogs need about 20–30% fewer calories to maintain the same weight. I can usually tell within a visit or two which dogs have recently been fixed and whose owners haven't adjusted the food — they're the ones who are slightly softer than they were before.
Enter your dog's weight and activity level for a quick daily feeding estimate.
Use the Free Feeding Calculator →Twice a day is ideal for most adult dogs — morning and evening. Puppies under 6 months should eat 3–4 times daily. Once-a-day feeding is generally not recommended as it can cause hunger-related behavioral issues and increases the risk of bloat in larger breeds.
Both are nutritionally complete if they're high quality. Dry kibble is more economical and better for dental health. Wet food has higher moisture content which is beneficial for dogs who don't drink enough water. Many owners feed a mix of both. The most important thing is the quality of the ingredients, not the form.
Probably not. Most dogs are opportunistic eaters who will act hungry even if they're well-fed. The body condition score check is far more reliable than your dog's behavior at mealtime. If the ribs are easy to feel, the waist is visible, and the belly tucks up — your dog is eating the right amount.