How many calories does a dog need per day?

It depends on size and activity level. A typical formula is Resting Energy Requirement (RER) = 70 × (body weight in kg)^0.75, then multiply by an activity factor (1.4 for typical adult, 1.6 for active, 1.0 for senior/inactive). For example, a 30 lb (13.6 kg) adult dog needs approximately 70 × 13.6^0.75 × 1.4 = ~700 calories per day. A 70 lb dog needs about 1,200 calories per day.

How much protein does a dog need?

AAFCO minimum is 18% of calories from protein for adult dogs and 22.5% for puppies. However, most veterinary nutritionists recommend 25-30% protein for active adult dogs. Large and giant breed puppies should get 26-28% protein (not more) to support controlled growth and reduce joint problems.

Do large breed dogs need different nutrition than small breeds?

Yes. Large and giant breed dogs have slower metabolisms per pound of body weight, so they need fewer calories per pound than small dogs. They also need controlled calcium levels (0.8-1.5% for large breed puppies vs up to 2.5% for small breed puppies) to prevent skeletal disorders. Large breeds benefit from joint-supporting nutrients like glucosamine, chondroitin, and omega-3 fatty acids.

Dog Nutrition Requirements by Breed Size

Name: Dog Nutrition Requirements by Breed Size
Creator: PetFeedCalc
Published: 2026-03-02
License: https://creativecommons.org/licenses/by/4.0/

March 2, 2026 · Data Reference · Sources: NRC, AAFCO, Merck Veterinary Manual

Every dog needs the same basic nutrients, but the amounts vary dramatically by size. A Chihuahua and a Great Dane have fundamentally different metabolic needs — and feeding the wrong amounts can lead to obesity, malnutrition, or growth disorders.

This reference page compiles nutrition data from the National Research Council (NRC), AAFCO nutrient profiles, and veterinary nutrition guidelines into one usable resource.

Daily Calorie Requirements by Size

The standard formula for canine calorie needs is: RER = 70 × (body weight in kg)^0.75, then multiply by a life-stage factor.

Size Category	Weight Range	Example Breeds	Adult Daily Calories (typical)	Cal/lb/day
Toy	2–10 lbs	Chihuahua, Yorkie, Pomeranian	150–400	40–55
Small	10–25 lbs	Beagle, French Bulldog, Dachshund	400–700	28–40
Medium	25–50 lbs	Border Collie, Bulldog, Cocker Spaniel	700–1,100	22–28
Large	50–90 lbs	Labrador, Golden Retriever, German Shepherd	1,100–1,700	19–22
Giant	90–200+ lbs	Great Dane, Mastiff, St. Bernard	1,700–3,000+	15–19

Calorie ranges assume moderately active adult dogs (activity factor 1.4×). Spayed/neutered dogs may need 10-20% fewer calories. Source: NRC (2006), AAFCO (2024).

Use our feeding calculator for a personalized calorie estimate based on your dog's exact weight and activity level.

Life Stage Multipliers

Life Stage	Multiply RER by	Notes
Puppy (0–4 months)	3.0×	Rapid growth phase
Puppy (4–12 months)	2.0×	Moderate growth
Adult (intact)	1.6×	Typical activity
Adult (neutered)	1.4×	Reduced metabolic rate
Senior (7+ years)	1.0–1.2×	Reduced activity
Working/athletic	2.0–5.0×	Varies enormously by workload
Pregnant (last 3 weeks)	1.5–2.0×	Increasing demand
Lactating	2.0–4.0×	Depends on litter size
Weight loss	1.0×	Feed at RER for ideal weight

Source: NRC Nutrient Requirements of Dogs and Cats (2006), Merck Veterinary Manual

Macronutrient Requirements

Nutrient	AAFCO Adult Min	AAFCO Growth Min	Recommended Range	Notes
Protein	18%	22.5%	25–35%	Higher for active dogs; quality matters more than quantity
Fat	5.5%	8.5%	10–20%	Essential for energy, skin, coat; reduce for overweight dogs
Fiber	No min	No min	2–5%	Aids digestion; higher (8-10%) for weight management formulas
Carbohydrates	No min	No min	30–60%	Dogs can thrive on low-carb diets; not an essential nutrient

Percentages are on a dry matter basis. Source: AAFCO Dog Food Nutrient Profiles (2024).

Size-Specific Nutrition Considerations

Toy & Small Breeds (under 25 lbs)

Higher calorie density needed — small dogs have faster metabolisms per pound and smaller stomachs, so they need calorie-dense food (3,500–4,000+ kcal/kg)
Feed 3 meals/day for dogs under 10 lbs to prevent hypoglycemia
Smaller kibble size for dental comfort and reduced choking risk
Prone to dental disease — crunchy kibble and dental chews help

Related: Puppy feeding schedules

Medium Breeds (25–50 lbs)

Most flexible in food choices — standard adult formulas work well
Watch for weight gain in less active breeds (Bulldogs, Basset Hounds)
2 meals per day is standard for adults

Large Breeds (50–90 lbs)

Controlled growth for puppies is critical — too-fast growth increases risk of hip dysplasia and osteochondrosis
Large breed puppy food should have calcium 0.8–1.5% (not higher)
Protein for large breed puppies: 26–28% (moderate, not high)
Consider joint supplements: glucosamine (500–1000mg) and omega-3 (EPA+DHA 1000–2000mg)
Bloat prevention: feed 2–3 smaller meals, avoid elevated bowls, no exercise 30 min after eating

Giant Breeds (90+ lbs)

Everything for large breeds applies, but even more critical
Lower calorie density food — giant breeds need fewer calories per pound (15–19 cal/lb/day)
Extended puppy growth period — giant breeds aren't fully mature until 18–24 months
Stay on large/giant breed puppy food until at least 18 months
Joint support is essentially mandatory — these dogs put enormous stress on joints

Key Mineral Requirements by Size

Mineral	Small Breed Adult	Large Breed Adult	Large Breed Puppy	Why It Matters
Calcium	0.5–2.5%	0.5–2.5%	0.8–1.5%	Skeletal development; excess harmful to large breed puppies
Phosphorus	0.4–1.6%	0.4–1.6%	0.6–1.3%	Must maintain 1:1 to 2:1 Ca:P ratio
Omega-3 (DHA+EPA)	0.05%+	0.05%+	0.05%+	Brain development, joint health, coat
Zinc	80 mg/kg	80 mg/kg	80 mg/kg	Immune function, skin health

Percentages on dry matter basis. Source: AAFCO (2024), NRC (2006).

Daily Feeding Amount Quick Reference

Dog Weight	Dry Food/Day (avg kibble ~350 kcal/cup)	Wet Food/Day (avg ~400 kcal/can)
5 lbs	½ cup	½ can
10 lbs	¾ cup	¾ can
20 lbs	1¼ cups	1¼ cans
30 lbs	1¾ cups	1¾ cans
50 lbs	2½ cups	2½ cans
70 lbs	3¼ cups	3¼ cans
90 lbs	4 cups	4 cans
120 lbs	5 cups	5 cans

Approximate amounts for moderately active adult dogs. Always check your specific food's calorie content and adjust accordingly. Source: PetFeedCalc calculations based on NRC formulas.

For exact amounts based on your dog's weight and food brand, use our feeding calculator.

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Data sourced from NRC Nutrient Requirements of Dogs and Cats (2006), AAFCO Dog Food Nutrient Profiles (2024), and Merck Veterinary Manual. If you cite this data, please link back to this page.