Raw feeding (BARF) for dogs: what the veterinary evidence actually says

In 30 seconds

BARF (Bones and Raw Food, the Billinghurst model) proposes feeding your dog raw meat, meaty bones, organ meats, and vegetables. It is a legitimate natural feeding approach, with families who choose it by conviction and dogs that thrive on it. Done right, it requires two things: a proper formulation that covers all essential nutrients in the correct proportions (calcium, phosphorus, vitamins, trace minerals) and strict hygienic handling of raw ingredients to manage microbiological risk, for both the dog and the people in the household. This article covers what the evidence says about its benefits, how to formulate it rigorously, and what food-safety practices to follow.

What BARF proposes and why it has advocates

Ian Billinghurst, an Australian veterinarian, proposed the model in the 1990s. Core idea: dogs evolved eating raw meat and bones. Typical BARF composition:

Component	Typical percentage
Raw muscle meat	60-70%
Raw meaty bones	10-15%
Raw organ meats (liver, kidney, heart)	10%
Vegetables and fruits	5-10%
Other (egg, yogurt, supplements)	5%

Reasons many families choose it:

Preference for a more natural, less processed diet.
Visible improvement in coat, energy levels, and smaller stools.
Wanting fresh food with full ingredient traceability.
A dog with chronic digestive issues looking for an alternative approach.

Many dogs thrive on well-formulated BARF. The practical question is not whether it works, but how to do it while meeting all nutritional requirements and handling raw food with the hygiene it demands. The next two sections address exactly that.

What raw feeding has going for it

That stools are smaller and less smelly has a logical basis: raw animal protein tends to have good digestibility. Improved coat appearance is also plausible, partly from fat intake and high-quality animal protein.

Some studies (still limited) observe in raw-fed dogs:

Less dental plaque (data still controversial).
Lower-pH stools with higher proteolytic activity.
Changes in gut microbiota (different, not necessarily better or worse).

These benefits depend primarily on ingredient quality and digestibility and on solid formulation, more than on the fact of serving food raw per se.

What you need to get right

A rigorous BARF diet addresses two well-documented fronts: nutritional balance and food safety. These are not reasons to reject it; they are the two areas where the work of doing it correctly is concentrated.

1. Nutritional balance: formulate the recipe properly

Pedrinelli et al. (2019) analyzed 120 home-prepared BARF recipes published in books, blogs, and social media:

95% had at least one clinically relevant nutritional deficiency.
The most common deficits: calcium, phosphorus, vitamins A, D, E, iron, zinc, copper, manganese.
Only 5% were formulated by a board-certified veterinary nutritionist and were nutritionally balanced.

The correct reading of this finding is about the method, not the concept: an improvised recipe tends to fall short, while a properly formulated recipe meets requirements. Deficits to watch for when the diet is not well formulated:

Deficit	Clinical consequence
Calcium (insufficient bones or no supplement)	Nutritional hyperparathyroidism, bone fractures; especially severe in puppies
Calcium/Phosphorus imbalance	Bone and dental problems
Insufficient or excessive Vitamin A	Ocular, skin, and bone problems
Insufficient Vitamin D	Rickets, bone problems
Iodine	Thyroid dysfunction
Iron	Anemia
Taurine (in some cases)	Dilated cardiomyopathy

The calcium-to-phosphorus ratio deserves special attention, particularly in large- and giant-breed puppies in the growth phase, where a prolonged Ca:P imbalance can cause permanent skeletal damage. This is why a proper BARF diet always starts with a formulation that gets this ratio right.

2. Food safety: handle raw ingredients properly

Davies et al. (2019), a systematic review published in the Journal of Small Animal Practice, documents that raw foods (both commercial and homemade) can show significant pathogen prevalences:

Pathogen	Prevalence in tested BARF samples
Salmonella spp.	4-60% across studies
Listeria monocytogenes	16-43%
Escherichia coli	30-50%
Campylobacter	6-22%
Clostridium perfringens	Frequent
Yersinia enterocolitica	Detected
Parasites (Toxoplasma, Sarcocystis, Neospora)	Source-dependent risk

This does not disqualify the diet, but it does make hygienic handling a core part of doing it correctly. Key risks to manage:

Possible gastroenteritis in the dog if an ingredient is contaminated.
Possible Salmonella transmission to people (with special caution around children, the elderly, and immunocompromised individuals).
Salmonella shedding by some dogs, which can reach household surfaces and objects.

For these reasons, the AVMA, FDA, CDC, WSAVA, FECAVA, and most veterinary associations advise caution with raw unprocessed diets, especially in households with vulnerable individuals. The practical response is the careful handling protocol described below, not abandoning natural feeding.

3. Bones: how to use them safely

Raw bones splinter less than cooked ones (cooked bones should never be given due to splintering risk). Even raw bones call for judgment:

Choose the right size and type for your dog to avoid tooth fractures.
Monitor for intestinal obstruction risk with certain bones (ribs, vertebrae).
Don't overdo the bone proportion to avoid constipation.

4. Cost and logistics

A well-formulated BARF diet for a 55-pound (25 kg) dog costs roughly $250 to $500 per month in the U.S. It requires:

A large freezer.
Weekly or bi-weekly shopping.
Prep time.
Specific supplementation based on the formulation.

How to do BARF right

If you choose this path, these steps are what turn it into a complete, safe natural diet.

Non-negotiable

Formulation by a board-certified veterinary nutritionist (ACVN, ECVCN), or through validated formulation software. This is what prevents deficits. Consultation cost in the U.S.: $200-500.
Nutritional analysis of the recipe before starting.
Human-grade ingredients, not industrial byproducts.
Pre-freeze fish and pork for at least 72 hours at -4°F (-20°C) before use (reduces some parasites, though it does not eliminate Salmonella or E. coli).
Strict hygiene during prep: surfaces, knives, and containers thoroughly cleaned and disinfected.
Separate refrigerator storage (lower shelf, sealed containers).
Heightened precautions in households with children under 5, the elderly, or immunocompromised individuals (CDC recommendation): either apply maximum hygiene or consider the cooked version instead.
Regular veterinary monitoring: bloodwork including CBC, chemistry panel, and electrolytes every 6-12 months.
Do not combine BARF and commercial kibble in the same meal (they differ in gastric pH and digestion dynamics).

For at-risk breeds and ages

For large- and giant-breed puppies, always work with a board-certified veterinary nutritionist.
Caution in senior dogs or those with health conditions (renal, cardiac, endocrine).
Pay special attention to the Ca:P ratio in puppies.

Another natural option: cooked, balanced home-prepared food

If you want fresh, natural feeding but prefer to avoid handling raw ingredients, a cooked home-prepared diet formulated by a veterinary nutritionist is an equally legitimate option:

Cooked food with a recipe formulated by a veterinary nutritionist.
Maintains full ingredient traceability.
Reduces the microbiological risk inherent in raw food.
Preserves digestibility benefits and the advantages of fresh ingredients.

In the U.S., specialized commercial fresh cooked services (The Farmer's Dog, JustFoodForDogs, Ollie, Nom Nom) produce AAFCO-compliant balanced cooked meals with veterinary formulation. More expensive than kibble, but more accessible than a properly done BARF diet.

What veterinary associations say

Association	Position on raw unprocessed diets
AVMA (USA)	Advises caution due to microbiological risk
FDA (USA)	Advisories on handling, controls, and recalls
CDC (USA)	Advises against in households with children under 5, elderly, or immunocompromised
WSAVA (Global)	Caution with raw diets in households with immunocompromised individuals
FECAVA (Europe)	Advises sanitary caution
Most state veterinary medical associations	Majority advise caution and professional formulation

The common denominator is not banning natural feeding, but requiring proper formulation and good hygienic handling.

What to verify

If you feed raw, that the recipe is formulated by a board-certified veterinary nutritionist (ACVN) or validated software.
If you feed raw, that you have a clear hygiene and raw-handling protocol in place.
If you feed raw in a household with children under 5 or immunocompromised individuals, either maximize hygiene or consider the cooked alternative.
If your dog has digestive issues, consult a veterinary nutritionist to choose the right approach (raw, cooked home-prepared, or a prescription elimination diet as appropriate).