Homemade Dog Food, Done Right: What the Evidence Actually Says
Written by thecanineledger
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1. Why this section exists
What this section will and won’t do.
It will tell you what the research actually found, cite it, and say plainly where the evidence is thin. It will explain what makes a diet complete, what the common failures are, and how to get a recipe that works.
It will not hand you a recipe. Not because we’re withholding one, but because the studies below found that the overwhelming majority of published recipes, including ones written by veterinarians, don’t meet nutritional guidelines. Publishing another one would make the problem worse.
And it will not tell you homemade is better than commercial food. That’s a different question, and the evidence doesn’t answer it. [Read our honest attempt at it →]
2. Start where you are
| If you are… | Start here |
|---|---|
| Deciding whether to cook at all | §3: What the studies found |
| Already cooking, and now worried | §4: What actually goes wrong |
| Ready to do it properly | §5: Getting a real recipe |
| Cooking for a puppy, or a sick dog | §6: When the margin is smaller |
| Just here about treats | §7: Treats |
3. What the studies actually found
Two studies dominate this subject, a decade apart, and both are routinely misreported.
The 2013 study: 200 published recipes, analysed against NRC and AAFCO standards. The finding: “most (190/200 [95%]) recipes resulted in at least 1 essential nutrient at concentrations that did not meet NRC or AAFCO guidelines” (Stockman et al., JAVMA 2013).
Only five recipes out of two hundred met a standard. All five were written by veterinarians.
The 2025 study: 1,726 diets that dogs were actually being fed, from the Dog Aging Project cohort. The finding: “Only 6% of these diets were potentially nutritionally complete” (O’Brien et al., AJVR 2025).
You have probably seen that reported as “94% of homemade diets are incomplete.” That number is not in the paper: it’s 100 minus 6, computed by whoever wrote the first headline. The distinction matters, and not in the direction you’d expect: the study had no ingredient quantities, so the lead author says the true figure of complete diets “may be smaller than 6%.” It’s a best-case screen.
We’re being pedantic about this on purpose. A site that inflates a statistic in its own favour has no business criticising anyone else’s sourcing.
→ Why Most Homemade Dog Food Isn’t Complete, And What the Studies Actually Found
What neither study showed
Neither examined a dog. Neither analysed food in a laboratory. They evaluated recipes and ingredient lists. Nothing here means your dog is ill: deficiency takes time to produce disease, adult dogs have reserves, and plenty of home-fed dogs are visibly thriving.
4. What actually goes wrong
The studies agree on which nutrients fail, and every failure has an ordinary kitchen explanation.
Zinc: deficient in 69% of recipes, the commonest gap. Poorly absorbed to begin with, and actively blocked by phytate in grains and legumes and by excess calcium.
Choline: 64.5%. Egg yolk and liver are the practical sources. Chicken breast and rice supply almost none.
Copper: 54%. Concentrated in organ meat. No liver, no supplement, no copper.
EPA and DHA: 53.5%. Cooking “healthy” by stripping fat removes the nutrient class that carries essential fatty acids and the fat-soluble vitamins with them.
Calcium: 35%, and the one with published evidence of harm behind it. Muscle meat is high in phosphorus and very low in calcium, so a meat-and-rice diet without bone or a calcium salt has an inverted calcium-to-phosphorus ratio, and the body strips calcium out of the skeleton to compensate.
A 2024 case series described four large-breed puppies fed unsupplemented boneless raw meat. All four had reduced skeletal density on imaging. Two had fractures and were euthanised (Nowak et al., Animals 2024).
→ The Calcium Problem: Why Meat-and-Rice Diets Break Bones · → The Seven Nutrients Homemade Diets Miss Most
The fix that isn’t a fix
Adding a multivitamin is the intuitive answer and it does not reliably work. A study of 100 recipes concluded, verbatim: “The presence of supplement on its own does not ensure a balanced diet for dogs and cats.” Zinc stayed deficient in supplemented and unsupplemented recipes alike (BMC Veterinary Research 2021).
→ Why Adding a Multivitamin Doesn’t Fix an Unbalanced Recipe
5. Getting a real recipe
This is the part that actually solves the problem, and it is the least-covered part of the subject online.
Professional guidance is unambiguous. The WSAVA nutritional assessment guidelines instruct veterinarians to “contact a board certified veterinary nutritionist or equivalent to evaluate or formulate a homemade diet” (WSAVA 2011).
One thing worth knowing before you go looking: “pet nutritionist” is an unregulated title that anyone may use. A board-certified veterinary nutritionist has completed veterinary school, an internship, a two-to-three-year residency and board examinations. There are roughly 100 in the US (Tufts Petfoodology).
→ How to Get a Properly Formulated Recipe (and What It Costs) · → Balancing Premixes: What They Do, and the Evidence Gap
And then the harder part: following it
The most under-reported finding in this whole subject. Researchers surveyed owners who had been given a recipe by a veterinary nutrition service. A year later, 81% were still cooking, but only four owners, 13%, were following the recipe exactly (Johnson et al., JSAP 2016).
Read that carefully: 13% is four dogs from a small referral sample, not a population figure. But substitutions genuinely aren’t small. Baking potatoes instead of boiling them yields about 20% more potassium; swapping in sweet potatoes adds roughly 60% more calories.
→ How to Follow a Recipe Exactly, and Why Substitutions Aren’t Small
6. When the margin is smaller
Some dogs have far less room for error, and the evidence here is starker.
Puppies. Growth has a hard maximum for calcium as well as a minimum: AAFCO caps it at 1.8% of dry matter for foods that may be fed to large-breed puppies. Excess calcium is readily absorbed by growing dogs even when they don’t need it, and Merck states that excessive supplementation “causes more severe clinical signs of osteochondrosis and decreased skeletal remodeling in young, rapidly growing large-breed dogs.” Adult dogs buffer mistakes; puppies build them into permanent skeleton.
Kidney disease. A study of 39 canine recipes for chronic kidney disease found that none provided adequate concentrations of all essential nutrients (Larsen et al., JAVMA 2012). Some contained demonstrably wrong information: one recommended baking soda as a calcium source, which contains no calcium and adds sodium to a patient who shouldn’t have it.
Cancer. Of 27 home-prepared recipes for dogs with cancer, none met NRC or AAFCO profiles for all essential nutrients, and some contained “excessive, potentially toxic amounts” (Heinze et al., JAVMA 2012).
Weight loss. Calorie restriction proportionally restricts every nutrient, so a diet that’s marginal at maintenance becomes frankly deficient at 70–80% of maintenance energy.
Tufts lists the groups who should avoid home-cooked diets: young growing animals, pregnant and nursing animals, animals on weight-loss programmes, and most cats (Freeman, Tufts Petfoodology).
One genuine argument in favour
For fairness: there is a narrow case where home-prepared is demonstrably the only option. A 2022 costing study formulating ultra-low-fat home-cooked diets for dogs with chronic enteropathies found no commercial equivalent existed at that fat level (Kratzer et al., JAVMA 2022).
7. Treats
The lowest-risk entry point, with two things worth knowing.
The 10% rule. Treats and extras shouldn’t exceed 10% of daily calories: the other 90% comes from a complete and balanced food (UC Davis). Honest caveat: we could find no experiment establishing 10% as the breakpoint. It’s consensus arithmetic with institutional backing, not a measured finding.
Toxic ingredients are a real recipe problem, not a theoretical one. A study of published Portuguese-language recipes found 10.2% contained onion or garlic (Pedrinelli et al. 2017). And the single most dangerous thing in a home baker’s cupboard is xylitol: hypoglycaemia has been associated with doses above roughly 100 mg/kg, and liver failure above 500 mg/kg (Merck Veterinary Manual). It’s in sugar-free peanut butter.
→ The 10% Rule · → Ingredients That Are Toxic to Dogs, With the Actual Evidence
8. How this section is made
Every claim is linked to its source, preferably the study rather than someone’s summary of it.
Every page here is our summary of the published research, as we understand it. It is not reviewed by a vet. Confirm anything you plan to act on with your own vet.
Where the evidence is thin, we say so. You’ll find sentences on these pages admitting a widely repeated claim has nothing behind it, including claims made by people on our side of an argument.
Some pages carry affiliate links, disclosed at the top. Commissions never change a verdict, and we have said in print that no independent evidence exists for the effectiveness of any commercial balancing premix, including ones we link to.
How we research → · Editorial policy → · Affiliate disclosure →
This is information, not veterinary advice. Nothing here can assess your dog. Diet changes (particularly for puppies, or for a dog with any diagnosed condition) belong with a veterinarian who has examined them.
Always confirm with your vet before acting on anything on this page.