Raw Feeding for Dogs: Prey Model vs BARF Compared (2026)

Raw feeding has moved from a fringe practice to a mainstream subculture inside the dog world, and the two main philosophies, prey model raw and BARF, are often treated as interchangeable when they actually disagree on fundamental questions. Should dogs eat vegetables. Should supplements be added. Are dairy products acceptable. How closely should a domestic dog’s diet mirror a wolf’s. These differences matter because they change which dogs each approach suits, how easy it is to keep the diet balanced, and how risky the daily logistics become. This article unpacks both models, looks honestly at the evidence (and the lack of it), and gives you a framework to decide whether either approach fits your situation.

The two philosophies side by side

Prey model raw (PMR) is built on the premise that dogs are functionally carnivores and should eat what a wild canid would eat: whole prey animals. The classic ratios are 80 percent muscle meat, 10 percent raw meaty bone, 5 percent liver, and 5 percent other organs (kidney, spleen, brain, etc). No vegetables, no grains, no supplements unless deficiency is identified. Some PMR feeders go further and try to feed whole prey items (whole rabbits, whole quail, whole fish) rather than recombined pieces.

BARF (Biologically Appropriate Raw Food), popularised by Dr Ian Billinghurst, keeps a meat and bone foundation but explicitly includes vegetables, fruits, and sometimes dairy, eggs, and supplements. A typical BARF model is around 70 percent muscle meat and bone, 10 percent organ, 10 to 20 percent vegetables and fruit, with added supplements like kelp, fish oil, or eggshell calcium.

PMR adherents argue dogs do not need plant matter and that adding vegetables is a human projection. BARF adherents argue that wild canids routinely eat the stomach contents of prey, that domestic dogs have evolved enzymes for some starch digestion (the AMY2B gene story), and that a small amount of plant material adds fibre, micronutrients, and antioxidants.

Neither side has clean evidence to settle the argument.

Where the evidence actually sits

The published literature on raw feeding is thinner than the marketing suggests, and most of it focuses on safety rather than long-term health outcomes. What we do have:

• Microbiological risk is real and well-documented. Raw meat for pets is repeatedly shown to carry Salmonella, Listeria, Campylobacter, and pathogenic E. coli at higher rates than cooked food. Dogs fed raw shed these organisms in their stool, and the FDA has recalled multiple commercial raw products over pathogen contamination.
• Nutritional balance is the biggest practical issue. Analyses of home-prepared raw diets, including ones following popular ratios, frequently find deficiencies in calcium-to-phosphorus ratio, iodine, manganese, zinc, vitamin D, vitamin E, and omega-3s. Following 80/10/10 does not guarantee balance.
• Dental claims are partly supported. Some studies show less plaque and tartar in raw-fed dogs, though the trade-off includes higher fractured tooth rates from bone chewing.
• Bowel and bone obstruction risk is documented in raw-fed dogs, particularly with weight-bearing bones from larger animals.
• No peer-reviewed long-term study has shown that raw feeding extends lifespan, reduces cancer rates, or treats any specific disease better than a balanced cooked diet.

The honest summary: raw feeding can be done well, it is often done badly, and the marketing claims around healing and longevity are not backed by good controlled data.

Where PMR tends to struggle

The biggest practical problem with pure prey model is hitting micronutrient targets without supplements. A few specific issues come up repeatedly:

• Manganese is hard to source without organ variety beyond liver and kidney. Tripe and mussels help, but availability and rotation matter.
• Vitamin E drops as you increase fish content (oxidation) and many PMR plans run low.
• Iodine can run low or high depending on whether sea fish and shellfish are rotated in.
• Calcium-to-phosphorus ratio is highly bone-dependent. Too little bone and the ratio inverts dangerously. Too much bone causes constipation and risks calcium excess in growing dogs.

PMR works when the feeder is rigorous about variety, rotates protein sources, includes a wide range of organs, and ideally has a recipe checked against canine nutrient minimums. It fails when “80/10/10 chicken every day” becomes the default.

Where BARF tends to struggle

BARF has the advantage of vegetables and added supplements, but it has its own failure modes:

• Vegetable choice matters and the food processor matters. Dogs do not break down intact plant cell walls well, so finely chopped or pureed vegetables are more useful than chunks.
• Calcium sources are less consistent. Some BARF feeders use bone, some use eggshell powder, some skip it entirely.
• Supplement stacking can push some nutrients (especially vitamin A from cod liver oil plus organ) into excess.
• Recipe drift is common. People start with a balanced BARF formula, then improvise based on what is in the freezer.

BARF tends to be more accommodating for dogs with mild GI sensitivity to high-fat all-meat models, and easier to balance for owners who are not chemistry-minded.

Practical safety basics for either approach

If you decide to feed raw, the floor of safe practice is:

• Source from suppliers with documented pathogen testing. Human-grade is not automatically safer for dogs but it usually comes with better cold chain.
• Treat raw meat in your kitchen the way you would treat raw chicken for yourself. Separate boards, disinfected surfaces, hand washing.
• Do not feed weight-bearing bones from large mammals. Stick to soft poultry bones, neck portions, and ground bone in mixes.
• Avoid raw fish from the Pacific Northwest river systems due to salmon poisoning disease risk.
• Skip raw feeding entirely if anyone in the household is immunocompromised, pregnant, very young, or elderly.
• Get a recipe checked. Either use a commercial raw product labelled complete and balanced to AAFCO or FEDIAF standards, or pay a board-certified veterinary nutritionist for a custom recipe.

Who each approach actually suits

PMR makes sense for an experienced raw feeder, with healthy adult dogs, willingness to source diverse proteins and organs, and ideally a nutritionist-checked plan. It is a harder fit for first-time raw feeders.

BARF makes more sense for owners who want a raw-leaning diet but also want vegetables, eggs, and supplements as buffers against deficiency. It is generally easier to balance and more forgiving of imperfect protein rotation.

Neither approach is a fit for puppies, pregnant or nursing dogs, dogs with pancreatitis, dogs with significant GI disease, dogs on immunosuppressive drugs, or households where a vulnerable person could be exposed.

If raw is something you are considering, start with a commercial complete-and-balanced raw or freeze-dried raw product, see how the dog tolerates it, and only move to home preparation after working with a vet nutritionist. For broader context on the freeze-dried side, see our freeze-dried vs air-dried explainer and our testing methodology.

Frequently asked questions