How much homemade food should I feed my dog?

Start from your dog's daily calorie need using the RER formula (70 times body weight in kg to the 0.75 power, times an activity factor), then divide by your specific recipe's calorie density, since homemade recipes vary in density batch to batch.

Can I just use the same portion size every time?

No, not if your recipe or your dog's weight changes. A fattier batch packs more calories into the same volume, and calorie needs shift as puppies grow or dogs move through weight loss or aging.

Is homemade dog food automatically healthier than commercial food?

Not automatically. Commercial food is formulated to meet AAFCO nutrient profiles; a homemade recipe has to be deliberately balanced, often with a vet or veterinary nutritionist's help, to meet the same standard.

What's the biggest risk with homemade dog food?

Nutritional gaps, especially calcium-to-phosphorus ratio, vitamins, and specific amino acids, are more common than most owners expect, particularly in long-term homemade diets that weren't checked against AAFCO standards.

Do puppies need a different homemade feeding approach than adult dogs?

Yes. Puppies are especially sensitive to calcium and phosphorus balance for proper skeletal development, which makes vet or veterinary nutritionist review more important for growing dogs.

Should I add supplements to a homemade diet?

Most homemade diets need a calcium source at minimum, since meat alone is calcium-poor relative to a dog's needs. A vet or veterinary nutritionist can specify exactly what your recipe is missing.

Homemade Dog Food Serving Size by Weight

The myth: homemade means healthier, and portions work like store-bought food

Cooking for your dog feels like the safer, more controlled option: you know exactly what's in the bowl. But "homemade" doesn't automatically mean "balanced," and portion math for homemade meals doesn't work the same way it does for commercial kibble. Bagged dog food lists calories per cup because the recipe and density are fixed. A home-cooked meal's calorie density changes with every batch depending on the ratio of meat, fat, starch, and vegetables you used, which means a cup-based portion from a commercial feeding chart doesn't transfer over.

Why calories, not cups, are the real unit

The starting point for any homemade dog food plan is your dog's daily calorie need, not a cup measurement. Vets commonly calculate this using Resting Energy Requirement (RER), a formula referenced in veterinary nutrition guidelines: RER = 70 × (body weight in kg)^0.75. That gives you the calories a dog burns at rest. From there, RER gets multiplied by an activity and life-stage factor (higher for active or growing dogs, lower for seniors or dogs needing weight loss) to get the actual daily calorie target.

Once you know the daily calorie target, you work backward to portion size using the actual calorie density of your specific homemade recipe, which depends on the ingredients you used that week. This is the step that trips people up: a recipe heavier in fat can pack noticeably more calories into the same volume than a leaner one, so "the same size bowl as last time" doesn't mean "the same calories as last time" if the recipe changed.

The bigger issue: nutritional completeness

Serving size is only half the problem. The other half is whether the recipe itself meets a dog's actual nutrient needs, and this is where a lot of homemade diets fall short even when portions are calculated correctly. AAFCO (the Association of American Feed Control Officials) publishes nutrient profiles that commercial pet foods are formulated to meet, covering not just calories but calcium-to-phosphorus ratio, specific amino acids, and vitamin and mineral levels that are easy to get wrong without lab-tested recipes.

A homemade diet built around "meat, a starch, and some vegetables" can look complete and still fall short on calcium, certain vitamins, or the right fatty acid balance over time. This matters most for puppies, whose skeletal development is sensitive to calcium and phosphorus ratios, and for dogs on a homemade diet long-term rather than as an occasional meal. A board-certified veterinary nutritionist (look for the ACVN credential) can formulate or review a recipe against AAFCO's standards, which is the safest way to go homemade long-term rather than guessing.

A general starting framework

This isn't a substitute for a vet-reviewed recipe, but it's the shape a homemade meal plan typically follows once calorie needs are set:

Component	Typical share of the meal (by weight, cooked)	Notes
Protein (meat, poultry, fish, eggs)	Roughly 40–50%	The main calorie and amino acid source
Carbohydrate (rice, oats, sweet potato)	Roughly 25–35%	Energy and fiber, adjust down for weight loss
Vegetables	Roughly 10–15%	Fiber and micronutrients, not a calorie driver
Fat and supplements	Small remainder	Calcium source, fish oil, and any vet-recommended additions go here

The exact ratios shift based on your dog's life stage, activity, and any health conditions, which is exactly why a generic ratio chart isn't a substitute for a formulated recipe.

Common mistakes with homemade feeding

Measuring by volume instead of calories. A cup of a fatty recipe and a cup of a lean recipe are not nutritionally equivalent, even though they look the same in the bowl.

Skipping the calcium source. Meat alone is calcium-poor relative to what a dog needs; commercial food already accounts for this, but a homemade recipe has to add it deliberately, often through ground bone, a calcium supplement, or another vet-recommended source.

Keeping portions fixed as the dog's weight changes. A calorie target that's right for a growing puppy or a dog mid-weight-loss becomes wrong within weeks. Portions need to be recalculated as weight and life stage change, not set once and left alone.

Assuming "vet-approved ingredients" means "vet-approved recipe." Individual ingredients being safe for dogs doesn't mean the overall recipe hits the right nutrient balance. Completeness is a property of the whole formulation, not the ingredient list.

Free-feeding a homemade diet. Without a fixed portion, calorie control (the entire point of doing the math in the first place) goes out the window.

Never re-checking after a recipe change. Swapping the protein source, the starch, or the fat content changes the calorie density of the whole recipe, which means the old portion size no longer delivers the same calorie total.

Recommended tools

Dog Food Calculator: get daily portion targets in cups and grams using vet-referenced RER/DER formulas as your starting point.
Dog Calorie Calculator: calculate your dog's daily calorie need adjusted for age, activity, and spay/neuter status before you portion out a homemade recipe.
Dog RER / Kcal Calculator: see the exact WSAVA-referenced Resting Energy Requirement formula and math behind the calorie target.
Dog Weight Calculator: confirm your dog's healthy weight range so the calorie target you're portioning for is actually the right one.
Raw Diet Planner: a related option if you're weighing homemade cooked food against a raw feeding approach.

The bottom line

Homemade dog food isn't automatically healthier or automatically harder to get wrong; it's just a different kind of math than reading a bag label. Start from your dog's actual calorie need, not a cup measurement, recalculate portions whenever the recipe or your dog's weight changes, and get a long-term recipe checked against AAFCO nutrient profiles by a vet or veterinary nutritionist rather than assembling one from instinct. Use the Dog Calorie Calculator to set the target before you portion out the bowl.