How Much to Feed My Dog?

Most adult dogs need roughly 25–30 calories per pound of body weight per day, adjusted for age, activity, and whether they're spayed or neutered. A healthy 50-pound adult dog usually lands between 1,250 and 1,500 kcal a day, split into two meals.

That's the short answer. The longer answer depends on your specific dog, and the bag's feeding chart is almost always wrong for them.

Start with calories, not cups

Kibble brands print feeding guides based on average dogs. Your dog isn't average. A neutered Lab who naps all day burns about 20% fewer calories than the intact working dog on the same bag.

The standard formula vets use is the Resting Energy Requirement (RER):

RER = 70 × (body weight in kg)^0.75

Then you multiply by a daily activity factor:

• Neutered adult, normal activity: 1.6 × RER
• Intact adult: 1.8 × RER
• Weight loss: 1.0 × RER
• Active/working dog: 2.0–5.0 × RER
• Puppy under 4 months: 3.0 × RER
• Puppy 4 months to adult: 2.0 × RER

Worked example

You have a 50-pound (22.7 kg) neutered adult Beagle, normal activity.

1. RER = 70 × (22.7)^0.75 = 70 × 10.4 ≈ 728 kcal
2. Daily need = 728 × 1.6 ≈ 1,165 kcal/day

If your kibble is 380 kcal per cup, that's about 3 cups daily, split into two meals. The bag probably says 2 to 2.5 cups for that weight range. You'd be underfeeding by ~25%, or overfeeding if your dog is closer to couch-potato.

If math isn't your thing, the /paws/tools/food-portion-calculator runs the same numbers for you in about ten seconds.

Read the kcal/cup line, not the price

Two foods at the same price can differ by 150 kcal per cup. That's a 40% swing in how much you scoop. The number you want is on the bag in small print, usually labeled "Metabolizable Energy" or "ME kcal/cup."

Examples from current popular foods:

• Hill's Science Diet Adult: ~363 kcal/cup
• Purina Pro Plan Adult: ~410 kcal/cup
• Orijen Original: ~470 kcal/cup
• A typical raw patty: ~600 kcal per 8 oz patty

Switch brands and you have to switch the scoop. Owners who change food without recalculating are the single most common cause of unintentional weight gain vets see in annual exams.

Puppies eat very differently

Puppies need 2 to 3 times the calories per pound that adults do, and they need it spread across more meals.

• Under 12 weeks: 4 meals a day
• 3 to 6 months: 3 meals a day
• 6 months to 1 year: 2 meals a day

Large and giant breeds (over 50 lbs adult weight) need controlled growth, not maximum growth. Feeding a Great Dane puppy too much calcium or too many calories raises the risk of developmental orthopedic disease, including hip dysplasia and osteochondrosis. The AAFCO large-breed puppy statement on the bag isn't marketing. It matters.

Weight check beats math

The numbers above are starting points. Your dog's body tells you if you got it right.

Run your hands along the ribs. You should feel them with light pressure, like the back of your hand. If they feel like your knuckles, your dog is underweight. If you can't find them without pressing, it's too much food.

Looking down from above, you should see a clear waist behind the ribs. From the side, the belly should tuck up toward the back legs.

Weigh your dog every two weeks during any food change. Adjust portions by 10% in either direction if weight is drifting. Don't change everything at once.

Treats count. Really.

The 10% rule is real. Treats, table scraps, training rewards, and chews should not exceed 10% of daily calories. For our 50-pound Beagle, that's 116 kcal. One medium dental chew can be 80 kcal. Three Milk-Bones, similar.

If your dog gets training treats, cut the main meal by an equivalent amount that day. A leaner dog lives longer. The classic Purina lifespan study (Kealy et al., 2002) followed 48 Labradors over their lifetimes. The lean-fed group lived a median of 13 years versus 11.2 years in the control group. That's nearly two extra years for cutting portions about 25%.

Senior dogs and special cases

Dogs over 7 typically need 10–20% fewer calories than they did at 4, unless they have a thyroid issue or specific health condition. Metabolism slows, but appetite often doesn't.

If your dog has been diagnosed with kidney disease, diabetes, pancreatitis, or food allergies, the calorie math still applies but the food itself is a prescription decision. Don't DIY that.

For an honest read on whether your dog is the right weight for their age and stage, the /paws/tools/dog-age-calculator gives you a quick life-stage estimate that pairs with the portion calculator.

When to call your vet

• Sudden appetite drop lasting more than 24 hours
• Weight loss over 5% in a month without a diet change
• Constant hunger plus increased thirst and urination
• Bloating, especially in deep-chested breeds

Try the numbers above for two weeks, weigh your dog, and adjust. Most overfeeding mistakes shrink fast once you swap the scoop for a kitchen scale and recheck monthly.

Run your dog's exact number here: Food Portion Calculator.

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