Practical, evidence-based guide to raw feeding dogs: BARF vs prey model, balancing bone/organs, calories, safe handling, supplements, transition tips, and who should avoid raw diets.

Nutritional Snapshot

• Typical macronutrient target (raw): Protein 20–30% of metabolizable energy; Fat 15–35%; Carbohydrate <10–15% (variable). Fiber 1–5%.
• Calcium:phosphorus target ratio: 1:1 to 2:1 (aim ~1.1–1.5:1).
• Energy calculation: RER = 70 × (kg body weight)^0.75. Adult MER ≈ RER × 1.4–1.8 (neutered 1.4–1.6, intact/active higher).
• Typical feed rates: ~1.5–3.5% of body weight/day for adults (depends on energy density and activity). Puppies often 3–8%.
• Key micronutrients to monitor/supplement: calcium, phosphorus, vitamin A & D, iodine, zinc, selenium, vitamin E, B vitamins, taurine (in some breeds), omega-3 EPA/DHA.
• Food safety: raw food can carry Salmonella, Campylobacter, Listeria, pathogenic E. coli. Proper freezing, refrigeration, separation, and hygiene reduce but do not eliminate risk.

Why owners choose raw feeding

Owners choose raw feeding for perceived benefits: shinier coat, smaller/firmer stools, weight control, dental health, and wanting minimally processed foods. Scientific evidence is mixed and depends heavily on diet formulation and safe handling. Unbalanced homemade raw diets and food-borne pathogens are real risks for pets and people.

Two main raw approaches: BARF vs Prey model

BARF (Biologically Appropriate Raw Food / Bones And Raw Food)

• Typical composition: a mix of muscle meat, raw meaty bones, organ meats, vegetables, often supplements (fish oil, eggshell or bone meal, vitamins).
• Philosophy: provide a broad range of whole foods and supplements to cover nutrients.
• Pros: flexible, can include variety of foods and supplements to try to meet nutrient targets.
• Cons: recipes frequently unbalanced unless formulated by a qualified nutritionist; risk of inappropriate bone amounts or incorrect calcium/phosphorus.

Prey model (Prey-fed)

• Typical composition: modeled after whole prey: ~80% muscle meat, 10% edible bone, 5% liver, 5% other organs.
• Philosophy: simplicity and species-appropriate proportions; less plant matter.
• Pros: easier to maintain safe Ca:P if followed carefully; fewer ingredients to get wrong.
• Cons: may still be deficient in some micronutrients (iodine, vitamin D, vitamin E) and needs careful sourcing and monitoring.

Nutritional balancing — what matters most

• Energy: calculate RER and MER rather than guessing by eye. RER = 70 × (body weight in kg)^0.75. Example: 20 kg dog RER ≈ 660 kcal; neutered adult MER ≈ 660 × 1.6 ≈ 1,056 kcal/day.
• Protein: AAFCO minimum for adult maintenance is 18% (as-fed basis for conventional diets); raw diets commonly provide 20–30% of energy from protein. Growing or athletic dogs benefit from higher protein within that range.
• Fat: 15–35% of energy is typical; increased fat increases calorie density and risk of pancreatitis in predisposed dogs—avoid sudden, large increases.
• Carbohydrate: not required but often present. Raw diets are typically low-carb. Fiber 1–5%.
• Calcium and phosphorus: maintain Ca:P ~1:1 to 2:1 (aim ~1.1–1.5:1). Too much bone leads to hypercalcemia/constipation; too little leads to metabolic bone disease in growing dogs.
• Vitamins & trace minerals: vitamin A (avoid chronic mega-dosing), vitamin D (dangerous in excess), vitamin E, B vitamins, iodine, zinc, selenium, copper — many homemade diets lack adequate levels unless formulated.

Bone-to-meat ratios and organ meat importance

• Prey-style: 80% muscle meat, 10% edible bone, 5% liver, 5% other organs (e.g., kidney, spleen). Liver should not exceed ~5–10% of total diet because of vitamin A excess risk.
• BARF variants may list 70–80% muscle, 10–20% raw meaty bone, 5–10% liver, 5–10% other organ & 0–10% plant matter.
• Edible bone supplies calcium & phosphorus; crushed eggshell or ground bone meal can be used if feeding boneless meats — but dosing must be precise.
• Organs are nutrient-dense; liver supplies vitamin A and copper, other organs supply B vitamins and trace elements. Omitting organ meat is a common cause of micronutrient deficiency.

Key micronutrients and common supplements

• Calcium & phosphorus: balance to Ca:P 1:1–2:1. If feeding no edible bone, use a calcium supplement (e.g., calcium carbonate or bone meal at a dose to achieve ~1.1–1.5:1 ratio).
• Vitamin D: dogs require dietary vitamin D; avoid unsupervised dosing due to toxicity. Commercial balanced diets meet needs; homemade raw diets often require supplementation.
• Omega-3 (EPA/DHA): recommend about 20–50 mg combined EPA+DHA per kg body weight per day (typical practical target: 50 mg/kg/day for anti-inflammatory benefits — consult your vet). Fish oil is common.
• Iodine: required for thyroid function; consider kelp or iodized salt carefully; risk of overdose with kelp. Test or use vetted supplements.
• Taurine: most dogs synthesize taurine; certain breeds (e.g., Newfoundlands, some deep-chested breeds) or diets low in bioavailable taurine may need attention. Consider testing if at risk.
• Multivitamin/mineral supplements: use those formulated for raw or homemade diets and follow manufacturer or nutritionist dosing.

Feeding schedule and amounts

• Adults: once or twice daily is typical. Split total daily calories across feedings. Example: a 20 kg neutered adult moderately active dog (MER ≈ 1,056 kcal/day) fed diet at 1,500 kcal/kg requires ~0.70 kg (700 g) raw food/day.
• Percent body weight rule (practical starting point): 1.5–3.5% of bodyweight/day for adult dogs depending on activity and energy density; adjust to maintain ideal body condition score.
• Puppies: frequent meals (3–4 per day for young puppies), total calories determined using growth MER multipliers; puppies typically require 2–3× RER depending on age — feed 3–8% of bodyweight depending on age and breed.

Sample daily meal (prey model) — 20 kg adult dog — target ≈ 1,050 kcal/day

Assumptions: diet energy density 1,500 kcal/kg (commercial raw or blended homemade with similar energy). Total daily weight ≈ 700 g.

• 80% muscle meat: 560 g (e.g., beef, chicken breast, turkey, lamb)
• 10% edible bone: 70 g (chicken frames, necks; ground bone if needed)
• 5% liver: 35 g
• 5% other organ: 35 g (kidney or spleen)

Safe handling and food-safety practices

• Purchase from reputable suppliers. Prefer commercial raw diets that carry a feeding trial or AAFCO statement or have been formulated by a board-certified veterinary nutritionist.
• Storage: keep frozen at ≤ −18 °C until use. Thaw in refrigerator, not on counter. Do not refreeze repeatedly.
• Time out of refrigeration: discard raw pet food left at room temperature > 1–2 hours (hot weather <1 hour).
• Preparation: use dedicated cutting boards, utensils, and bowls; wash with hot soapy water and sanitize surfaces after handling raw pet food; wash hands thoroughly.
• Clean up: empty bowls, refrigerate leftovers, clean bowls after each meal. Consider feeding outdoors or on easy-clean surfaces.
• Freezing reduces some pathogens but does not reliably eliminate all; some organisms survive freezing.
• Vulnerable people: households with children <5 years, elderly, pregnant women, or immunocompromised people should avoid handling raw pet food and ideally not keep raw-fed pets.

Who should not feed raw (or should do so only with professional guidance)

• Households with immunocompromised people, very young children, pregnant women, or elderly family members — higher zoonotic risk.
• Dogs with a history of pancreatitis or chronic GI disease; fat content and bacterial load can trigger issues.
• Dogs with renal disease or other metabolic conditions requiring strict phosphorus/calcium control.
• Dogs with poor dentition or a tendency to choke; whole bones pose physical risks.
• Owners unwilling or unable to follow strict safe-handling protocols or to have diets formulated/checked by a veterinary nutritionist.

Signs your raw diet is working

• Stable, ideal body condition score and steady weight.
• Glossy coat, healthy skin, good muscle mass.
• Firm, moderate-volume stools (quantity often smaller than kibble-fed dogs).
• Good energy levels and consistent appetite.
• Normal bloodwork per routine veterinary checks (CBC, biochemistry, including liver values, electrolytes as indicated).

Red flags — when the diet needs adjustment or discontinuation

• Chronic or recurrent diarrhea, vomiting, or very loose stools.
• Sudden weight loss or gain, muscle wasting.
• Frequent or severe constipation, gagging, or signs of bone obstruction (reduced appetite, vomiting, pain).
• Signs of pancreatitis: vomiting, abdominal pain, lethargy — seek immediate vet care.
• Abnormal routine blood tests: electrolyte imbalances, elevated liver enzymes, anemia, or low/high calcium/phosphorus.
• Any household member becomes ill with gastrointestinal symptoms after handling pet food.

Transitioning to raw — practical tips

• Transition slowly over 7–14 days. Start with 10–25% raw mixed into current food and increase gradually if stool remains normal.
• Begin with easily digestible muscle meats and small amounts of ground bone; introduce organ meat after several days.
• Start with single-protein meals to assess tolerance and stool quality before adding variety.
• Keep portions small during the transition; monitor stool frequency, consistency, and appetite.
• If your dog has prior GI sensitivity, consult your veterinarian before switching.

Final practical checklist

• Use RER/MER to calculate calories; don’t guess.
• Follow a balanced recipe formulated by a board-certified veterinary nutritionist or use a reputable commercial raw diet with an AAFCO statement or feeding trial data.
• Ensure Ca:P ~1:1–1.5:1 and include organ meat (especially liver and one other organ).
• Supplement thoughtfully (omega-3, iodine, multivitamin) and avoid vitamin D megadoses without professional advice.
• Practice strict hygiene and safe handling; be mindful of household risk factors.

References & further reading

• WSAVA Global Nutrition Toolkit (WSAVA). https://www.wsava.org/global-guidelines/global-nutrition-guidelines/
• AAFCO Dog Food Nutrient Profiles. https://www.aafco.org/
• National Research Council (NRC). Nutrient Requirements of Dogs and Cats. National Academies Press, 2006. https://www.nap.edu/catalog/10668/nutrient-requirements-of-dogs-and-cats
• FDA: Raw Diets for Pets: https://www.fda.gov/animal-veterinary/animal-health-literacy/raw-diets-pets
• Hand MS, Thatcher CD, Remillard RL, Roudebush P, Novotny BJ. Small Animal Clinical Nutrition (5th ed.).

Frequently Asked Questions