Few topics in canine nutrition generate more passionate debate than the raw diet. Proponents argue that feeding dogs uncooked meat, bones, and organs is the most natural and biologically appropriate choice available. Critics, including most veterinary medical organisations, point to real documented risks: bacterial contamination, nutritional imbalance, and zoonotic disease transmission to humans. Both sides have evidence. Sorting through that evidence — rather than relying on anecdote or ideology — is the purpose of this guide.
A raw diet for dogs is not a single thing. It encompasses several distinct feeding philosophies, commercially prepared products, and home-made regimens that vary enormously in safety and nutritional completeness. Understanding the differences is critical before making any decision.
What Is a Raw Diet for Dogs?
The term "raw diet" covers two main frameworks and several commercial products. The two principal frameworks are BARF and prey model raw.
BARF (Biologically Appropriate Raw Food) was popularised by Australian veterinarian Ian Billinghurst in his 1993 book Give Your Dog a Bone. The BARF model holds that dogs should eat raw meaty bones, muscle meat, organ meat, raw eggs, vegetables, and fruit. The original formulation suggested approximately 60% raw meaty bones, 25% muscle meat, and the remainder split between organs, vegetables, fruit, and eggs. Vegetables are included on the basis that wild canids occasionally consume the stomach contents of their prey. BARF supporters argue that the vegetables provide fibre, antioxidants, and micronutrients that an all-meat diet would not supply.
Prey model raw (PMR) takes a stricter position: dogs should eat as closely as possible to what a wolf or wild canid would eat in the field. PMR typically excludes vegetables and fruit entirely, instead focusing on a ratio of approximately 80% muscle meat, 10% raw edible bone, 5% liver, and 5% other secreting organ. The ratio is intended to approximate the composition of a whole prey animal. PMR advocates argue that dogs are carnivores, not omnivores, and that vegetables provide no nutritional value a dog cannot obtain from animal tissue.
Commercial raw diets exist as frozen raw patties, freeze-dried raw nuggets, and air-dried formulations. These products vary widely in quality and safety testing. Commercially prepared frozen raw diets produced by reputable manufacturers are generally considered safer than home-prepared raw because they are subject to some level of quality control, pathogen testing, and formulation oversight, though the degree of oversight varies by manufacturer.
The fundamental distinction from conventional kibble or canned food is the absence of cooking. Heat processing kills the bacteria and parasites that can be present in raw meat and reduces the risk of nutritional imbalance by allowing manufacturers to add precise vitamin and mineral supplements. Raw diets forgo these protections.
Claimed Benefits of Raw Feeding
Advocates of raw diets cite a range of benefits, some of which have limited supporting data and some of which are primarily anecdotal. A clear-eyed review separates the two categories.
Improved coat and skin condition is one of the most consistently reported owner observations after switching to a raw diet. A shinier coat and reduced flakiness are frequently cited. This may plausibly relate to the higher fat content of many raw diets — raw muscle meat and fatty cuts provide substantial amounts of omega-3 and omega-6 fatty acids. However, controlled studies comparing coat quality between raw-fed and premium kibble-fed dogs do not consistently show a measurable difference when the kibble is nutritionally complete and contains adequate fat.
Smaller, firmer stools are widely reported. Raw-fed dogs typically produce significantly lower stool volume than kibble-fed dogs. This is at least partially explained by the lower fibre content of raw diets — there is simply less undigested material. Whether smaller stools indicate superior digestion or simply a different digestive pattern is debated.
Improved dental health is a claimed benefit primarily from raw meaty bones, not the raw meat itself. The mechanical action of chewing through raw bone, connective tissue, and cartilage provides genuine abrasion against dental surfaces. Multiple veterinary dental studies have found that dogs fed raw meaty bones have less tartar accumulation than dogs fed only kibble. This benefit is real but must be weighed against the risks of bone feeding (discussed below).
Higher palatability is not a nutritional claim but a practical one. Most dogs find raw meat highly palatable. For dogs that are reluctant eaters or have developed finicky preferences, a raw or partially raw diet may increase food intake and enthusiasm. This is a genuine practical consideration.
Better weight management is cited by some proponents, who argue that the higher moisture content of raw meat contributes to satiety and that the lower carbohydrate load helps maintain lean body condition. Raw diets are indeed much lower in carbohydrates than most kibbles — dried extruded kibble typically contains 30-60% carbohydrate by dry matter, while raw muscle meat contains virtually none. Whether this carbohydrate reduction produces measurably better body composition in dogs eating adequate total calories has not been demonstrated in controlled trials.
"Natural" and "ancestral" alignment is the ideological argument at the centre of raw feeding advocacy. The argument is that dogs evolved eating raw food and are therefore best adapted to it. This argument has some face validity — dogs are descended from wolves, and wolves eat raw prey — but the domestication process spanning approximately 15,000 years has produced significant metabolic and digestive differences between wolves and dogs. Dogs have evolved greater ability to digest starch than wolves, reflected in copy number variations in the AMY2B gene (amylase). Whether modern dogs retain a digestive system that is genuinely "designed" for raw food is more ambiguous than raw feeding advocates typically acknowledge.
Documented Risks of Raw Diets
The risks of raw diets are well-documented and span bacterial contamination, nutritional imbalance, physical hazards from bones, and zoonotic transmission. These are not theoretical concerns but documented in peer-reviewed literature and public health data.
Bacterial Contamination
Raw meat is a well-established vector for bacterial pathogens. Multiple studies examining commercially prepared raw pet food have found contamination at significant rates.
A 2018 study published in Veterinary Record examined 35 commercially available raw pet food products from eight European countries and found that 28% tested positive for Salmonella and 54% contained enteropathogenic Escherichia coli. Approximately 43% of products contained Listeria monocytogenes, a pathogen of particular concern in immunocompromised individuals. Similar contamination rates have been reported in North American studies.
The U.S. Centers for Disease Control and Prevention (CDC) has documented multiple outbreaks of human illness linked to the handling of raw pet food. In a 2006-2007 outbreak, raw pet food contaminated with Salmonella Schwarzengrund caused illness in multiple people across more than 20 U.S. states. The CDC investigation found that people became ill through contact with contaminated food bowls, food preparation surfaces, or through direct contact with pets shedding the bacteria after consumption.
The American Veterinary Medical Association (AVMA) formally discourages raw diets due to the risk of pathogen exposure to both animals and humans, stating: "The AVMA discourages the feeding to cats and dogs of any animal-source protein that has not first been subjected to a process sufficient to eliminate pathogens." This is not an abstract precaution — it reflects documented illness and death in both pets and humans.
Dogs can carry and shed Salmonella and other pathogens without appearing ill, creating ongoing household contamination risk.
Nutritional Imbalance
Home-prepared raw diets are among the most nutritionally incomplete diets documented in veterinary medicine. A 2019 analysis published in the Journal of Nutritional Science evaluated 67 home-prepared raw diets and found that more than 60% were nutritionally unbalanced, with the most common deficiencies being vitamin D, iodine, copper, and zinc, and the most common excess being phosphorus relative to calcium.
The calcium:phosphorus ratio is one of the most critical nutritional considerations in raw feeding. Muscle meat is high in phosphorus but contains essentially no calcium. Bones are rich in calcium. Without the inclusion of an appropriate amount of raw edible bone — roughly 10-15% of the diet by weight — a home-prepared raw diet will produce dangerously low calcium and high phosphorus. In growing puppies, this imbalance causes metabolic bone disease, which can result in pathological fractures and permanent skeletal deformity. In adult dogs, prolonged calcium deficiency causes secondary hyperparathyroidism.
Vitamin D deficiency is common in raw diets because most muscle meat contains minimal vitamin D, and dogs cannot synthesise adequate vitamin D through sunlight exposure alone. Fatty fish, egg yolks, and liver contain vitamin D, but including these in appropriate quantities without causing vitamin A toxicity (from excessive liver) requires careful formulation.
Commercially prepared frozen raw diets from reputable manufacturers are formulated to meet Association of American Feed Control Officials (AAFCO) nutrient profiles, which reduces but does not eliminate nutritional risk.
Bone Feeding Hazards
The inclusion of raw bones is one of the most contested aspects of raw feeding. Proponents argue that raw bones are pliable and safe; critics point to documented injuries.
Cooked bones are universally considered dangerous because heat makes bone brittle and prone to sharp splintering. This point is not contested.
Raw bones are softer but not without risk. Raw bones can and do fracture teeth, particularly hard weight-bearing bones such as femurs. Slab fractures of the upper fourth premolar — the carnassial tooth — are a common presentation in veterinary dental practice in dogs fed raw bones. A fractured carnassial tooth requires either root canal treatment or extraction.
Gastrointestinal obstruction from bone fragments is documented even with raw bones. Flat bones, vertebrae, and bone fragments can pass through the stomach but become lodged in the intestine, requiring surgical intervention. Bone splinters can also perforate the oesophagus, stomach, or intestinal wall.
The risk is influenced by the type of bone: raw recreational bones (large femurs, hip bones) are harder and carry higher fracture risk; raw meaty bones (chicken necks, chicken wings, duck necks) are softer and lower risk, though still not risk-free. Supervision during bone feeding is always recommended.
Zoonotic Transmission
The risk to human household members from raw pet food extends beyond the food handling process. Pets fed raw diets shed higher loads of Salmonella in their faeces than pets fed commercial cooked diets, according to multiple studies. Children, elderly individuals, pregnant women, and immunocompromised individuals (cancer patients on chemotherapy, HIV-positive individuals, organ transplant recipients on immunosuppressant medications) are at substantially increased risk of serious illness from these pathogens.
This risk is not eliminated by careful food handling. It persists in the food bowl, on the floor around the feeding area, and in the pet's saliva after eating.
Bacterial Contamination in Raw Pet Food: Summary
| Pathogen | Typical Contamination Rate in Commercial Raw Pet Food | Human Health Risk |
|---|---|---|
| Salmonella spp. | 20-30% in studies | Salmonellosis: fever, diarrhoea, abdominal cramps; fatal in immunocompromised |
| Listeria monocytogenes | 35-54% in studies | Listeriosis: serious in pregnant women, elderly, immunocompromised; can cause miscarriage |
| Enteropathogenic E. coli | 50-60% in some studies | Gastroenteritis; STEC strains cause hemolytic uremic syndrome (kidney failure) |
| Campylobacter spp. | 10-20% in studies | Campylobacteriosis: gastroenteritis; most common cause of bacterial diarrhoea in humans |
| Clostridium perfringens | Variable | Food poisoning; GI symptoms typically self-limiting |
Nutritional Comparison: Raw vs Commercial Diets
| Nutritional Factor | Home-Prepared Raw | Commercial Raw (AAFCO-compliant) | Premium Dry Kibble |
|---|---|---|---|
| Protein content | Very high (35-55% DM) | High (30-45% DM) | Moderate-high (22-32% DM) |
| Fat content | High (variable) | Moderate-high | Moderate |
| Carbohydrate content | Very low (<5% DM) | Very low | High (30-60% DM) |
| Calcium:Phosphorus ratio | Often unbalanced | Typically balanced | Typically balanced |
| Vitamin D | Often deficient | Typically supplemented | Typically adequate |
| Pathogen risk | High | Moderate | Low |
| Nutritional completeness | Highly variable | Likely complete | Complete (AAFCO-tested) |
| Cost | High | High | Low to moderate |
AVMA Position and Veterinary Consensus
The AVMA, the American Animal Hospital Association (AAHA), the British Veterinary Association (BVA), and the World Small Animal Veterinary Association (WSAVA) have all issued statements discouraging or opposing raw diets for dogs and cats. The AVMA's policy is the most explicit: it actively discourages the practice and recommends that veterinarians counsel pet owners about the risks.
The veterinary consensus is not ideological opposition to natural feeding — it is a response to documented illness in animals and humans, documented nutritional deficiencies in home-prepared diets, and the absence of controlled clinical evidence demonstrating health benefits that could not be achieved through other means.
Veterinary nutritionists are the most appropriate professionals to consult if you are seriously considering a raw diet. Board-certified veterinary nutritionists (DACVN designation) can formulate complete and balanced recipes or evaluate commercial options. The website BalanceIT.com provides veterinarian-developed recipe formulation tools.
If You Choose to Feed Raw: Minimising Risk
Some owners, fully aware of the documented risks, choose to feed raw diets. For those owners, several practices reduce (though do not eliminate) those risks.
Choose commercially prepared frozen raw over home-prepared. Commercial manufacturers producing AAFCO-compliant products must meet nutritional standards and often conduct pathogen testing. This does not guarantee safety but provides significantly more assurance than home preparation.
Freeze-dried raw is the safest raw option. Freeze-drying (lyophilisation) removes approximately 98% of moisture and significantly reduces bacterial survival. Freeze-dried raw products retain the nutritional profile of raw food while substantially reducing pathogen risk. This is the option most likely to satisfy the intent of raw feeding with the least bacterial risk.
Handle all raw pet food as you would raw meat for human consumption. Wash hands thoroughly before and after handling. Use dedicated bowls and utensils. Disinfect food preparation surfaces with bleach solution. Do not allow pets to lick human faces immediately after eating.
Do not feed raw to households with immunocompromised individuals, infants, or pregnant women. This is not a precautionary over-reaction — it reflects documented zoonotic illness in these populations.
Consult a veterinary nutritionist before starting. A board-certified veterinary nutritionist can evaluate your specific situation, the dog's life stage and health status, and provide a formulated recipe or recommend a commercial product that meets complete and balanced standards.
Never feed cooked bones. This is an absolute regardless of feeding philosophy.
Monitor for signs of illness. Lethargy, vomiting, bloody stool, or changes in behaviour following raw food introduction warrant veterinary evaluation.
Raw Diet and Puppies
Raw diets carry heightened risks for puppies. Growing puppies have higher nutritional demands and narrower tolerances for imbalance than adult dogs. Calcium deficiency during skeletal development causes severe, irreversible consequences. Puppies also have less mature immune systems, making them more vulnerable to bacterial pathogens.
Most veterinary nutritionists do not recommend home-prepared raw diets for puppies under any circumstances. If an owner insists on raw feeding a puppy, a commercial AAFCO-compliant raw diet formulated for growth is the minimum standard, and consultation with a veterinary nutritionist is essential.
Cross-Links and Related Articles
For further information about dog nutrition and feeding practices, the following resources may be helpful:
- What Can Dogs Eat: Safe and Unsafe Foods
- Foods Toxic to Dogs Complete List
- Puppy Feeding Schedule by Age
- Senior Dog Nutrition Guide
- Wet vs Dry Dog Food: Which Is Better
References
Freeman LM, et al. "Current knowledge about the risks and benefits of raw meat-based diets for dogs and cats." Journal of the American Veterinary Medical Association. 2013;243(11):1549-1558. doi:10.2460/javma.243.11.1549
van Bree FPJ, et al. "Zoonotic bacteria and parasites found in raw meat-based diets for companion animals." Veterinary Record. 2018;182(2):50. doi:10.1136/vr.104535
American Veterinary Medical Association. "Raw or undercooked animal-source protein in cat and dog diets." AVMA Policy Statement. 2012 (revised 2023). avma.org
Schlesinger DP, Joffe DJ. "Raw food diets in companion animals: A critical review." The Canadian Veterinary Journal. 2011;52(1):50-54. PMID:21461207
Kerr KR, et al. "Apparent total tract energy and macronutrient digestibility and fecal fermentative end-product concentrations of domestic cats fed extruded, raw beef-based, and cooked beef-based diets." Journal of Animal Science. 2012;90(2):515-522. doi:10.2527/jas.2011-4103
Centers for Disease Control and Prevention. "Raw Pet Food and the Risk to You and Your Pet." CDC, 2021. cdc.gov/healthypets/pets/cats-dogs/raw-pet-food.html
Frequently Asked Questions
Is a raw diet safe for dogs?
Raw diets carry documented risks including bacterial contamination (Salmonella, Listeria, E. coli), nutritional imbalance, and zoonotic disease transmission to humans. The AVMA officially discourages raw diets. Commercially prepared freeze-dried raw products are safer than home-prepared raw, but risks are not eliminated. Consult a veterinary nutritionist before starting.
What is the BARF diet for dogs?
BARF stands for Biologically Appropriate Raw Food, a raw feeding framework developed by veterinarian Ian Billinghurst. It includes raw meaty bones, muscle meat, organ meat, raw eggs, vegetables, and fruit. The typical ratio is approximately 60% raw meaty bones, 25% muscle meat, and the remainder organs, vegetables, and eggs.
What bacteria are found in raw dog food?
Studies have found Salmonella in 20-30% of commercial raw pet food products, Listeria monocytogenes in 35-54%, enteropathogenic E. coli in 50-60%, and Campylobacter in 10-20%. Dogs can carry and shed these bacteria without appearing ill, contaminating household surfaces and posing risk to human family members.
What is the difference between BARF and prey model raw?
BARF (Biologically Appropriate Raw Food) includes vegetables and fruit alongside raw meat, bones, and organs. Prey model raw (PMR) excludes plant matter entirely and aims to replicate the whole prey animal composition: approximately 80% muscle meat, 10% bone, 5% liver, and 5% other organs. Both approaches carry nutritional risks if not carefully balanced.
Can puppies eat a raw diet?
Raw diets are higher risk for puppies because growing puppies have narrow nutritional tolerances. Calcium deficiency during skeletal development causes severe, irreversible consequences. Most veterinary nutritionists do not recommend home-prepared raw diets for puppies. If feeding raw to a puppy, only use AAFCO-compliant commercial raw formulated for growth, and consult a veterinary nutritionist.
What is the safest way to feed a raw diet?
The safest options are commercially prepared freeze-dried raw (not fresh raw) from AAFCO-compliant manufacturers. Handle raw pet food as you would raw meat for human consumption. Wash hands before and after handling. Do not feed raw in households with immunocompromised individuals, infants, or pregnant women. Consult a board-certified veterinary nutritionist (DACVN) before starting.