Raw Dog Food for Dogs: What the Science Actually Says About Safety

By Dr. Benjamin Hartley, DVM, DACVB · Veterinary Behavior Specialist

You've probably seen the social media posts: a golden retriever eating a beautifully arranged plate of raw meat, vegetables, and bone. The owner swears by it. Coat gleaming. Energy through the roof. Teeth cleaner than ever. It looks so natural — like what dogs were meant to eat.

But beneath the aesthetic lies a question that deserves more than anecdotes: what does the science actually say about raw dog food? The answer is more complex — and more concerning — than most online content suggests. This article breaks down the contamination data, the veterinary consensus, the nutritional risks, and the genuine benefits that owners report, so you can make a genuinely informed decision.

The Contamination Problem: What the Data Shows

Raw dog food is consistently contaminated with bacteria that can sicken both pets and humans — and the problem is getting worse, not better.

The most comprehensive FDA study on this topic screened over 1,000 pet food samples over two years. Of 196 raw pet food products tested, 15 (7.7%) contained Salmonella and 32 (16.3%) contained Listeria monocytogenes. By contrast, only 2 out of 480 dry and semimoist samples tested positive for any pathogen. That makes raw pet food roughly eight times more likely to harbor Salmonella than conventional kibble (Nemser et al., 2014).

Those numbers, however, represent just one snapshot. A systematic review published in MDPI Animals in 2025 compiled data from dozens of studies and found Salmonella contamination rates ranging from 6% to 80% across different products and countries. The variation depends on the type of meat, the manufacturer, and whether the product underwent any pathogen reduction treatment. What remains consistent is the direction: raw diets test positive for pathogens at dramatically higher rates than cooked alternatives.

The situation in Great Britain illustrates the trajectory. Government surveillance data shows that Salmonella isolations from raw pet food increased from just 4 in 2013 to 606 in 2022 — a 150-fold increase over a single decade. This tracks directly with the five-fold growth in raw pet food manufacturing plants operating in the country during the same period (APHA, 2026).

Beyond Salmonella, researchers have found E. coli in approximately 60% of commercial raw meat-based diets. A European study evaluating 51 commercial raw products found that 72.5% failed to meet basic EU hygiene standards for Enterobacteriaceae (Groat et al., 2022). One study detected Clostridium difficile in a commercially available turkey-based raw pet food, with toxin genes confirmed in the isolate.

Did You Know: Freeze-drying does not kill bacteria. In fact, scientists preserve bacterial cultures by drying them — bacteria can survive in a dried state for decades. This means freeze-dried raw treats carry the same pathogen risks as frozen raw food, despite appearing on grocery shelves next to cooked products (Cornell Riney Center, 2025).

What Veterinarians Actually Recommend

Every major veterinary association in the world advises against raw feeding — and their reasoning goes beyond simple contamination concerns.

The American Veterinary Medical Association (AVMA) revised its policy in 2024 to explicitly state that it discourages feeding raw or undercooked animal-source protein to dogs. The updated policy emphasizes that apparently healthy animals can still pose a risk to other animals and humans through pathogen shedding.

The World Small Animal Veterinary Association's Global Nutrition Committee was even more direct: "There is currently no properly documented evidence of health benefits for RMBD, but there are well documented risks. As such, the WSAVA Global Nutrition Committee recommends that RMBD not be fed to dogs and cats."

The Canadian Veterinary Medical Association went further, noting that "the scientific evidence of animal and human health risks in feeding RMB pet food products outweighs any purported benefits." Their statement documented a cluster of human infections acquired through raw pet food that resulted in a human fatality.

In the United States, the Delta Society's Pet Partners Program — which oversees therapy animal visits to hospitals — bars raw-fed animals from participating entirely, citing pathogen transmission risk to immunocompromised patients.

Vet Tip: If your veterinarian hasn't discussed your dog's diet with you, bring it up at the next visit. Mention whether you feed raw, freeze-dried, or any uncooked product — it directly affects the health risks your vet needs to monitor for.

Nutritional Risks You Might Not Expect

Even when raw diets avoid contamination, they frequently fail to meet your dog's nutritional requirements — and the imbalances can cause serious health problems over time.

A 2026 study in BMC Veterinary Research compared 51 dogs fed raw meat-based diets with 53 dogs fed conventional commercial food over at least 12 months. The raw-fed dogs showed lower body condition scores — but the blood work told a different story. They had significantly lower serum concentrations of iodine, copper, zinc, and manganese. The calcium-to-phosphorus ratio in their rations failed to meet the recommended minimum of 1.4, averaging just 1.0.

These aren't trivial deficiencies. Zinc deficiency affects skin health and immune function. Copper is essential for iron metabolism. Iodine is critical for thyroid function. The MDPI Animals review documented cases of hypervitaminosis A in cats fed liver-based raw diets, nutritional osteodystrophy in puppies fed BARF diets, and low plasma taurine levels in numerous dogs on raw feeding.

Bones present their own category of risk. The WSAVA notes that raw bone ingestion can cause constipation, diarrhea, dental fractures, and gastrointestinal obstructions requiring surgical intervention. Puppies are particularly vulnerable because they cannot yet crush bones safely.

Common Mistake: "My dog seems healthy on raw, so the nutrition must be fine." Many nutritional deficiencies develop gradually over months. Your dog may appear perfectly healthy while slowly developing mineral imbalances that only show up on blood work — or in health problems that emerge years later.

The Potential Benefits: What Owners Report

Some owners genuinely see improvements when switching to raw — but the evidence quality behind those improvements is far weaker than the contamination data.

The same BMC Veterinary Research study that documented nutritional gaps also found that raw-fed dogs had lower body condition scores (median 5 vs 6 on a 9-point scale) and consumed fewer calories relative to recommendations. With over 50% of US dogs estimated to be overweight, any dietary approach that helps maintain lean body weight has potential value.

Owner-reported benefits frequently include shinier coats, cleaner teeth, smaller and firmer stools, higher energy levels, and reduced allergy symptoms. Some of these observations may have biological explanations: raw diets are typically higher in protein and fat while lower in carbohydrates, and they retain more natural vitamins that can be degraded by cooking.

However, the MDPI review was unequivocal about the evidence quality: "The vast majority of owners' claims regarding the beneficial health effects of raw meat diets lack scientific substantiation." Most supporting evidence falls into Level III-IV categories — observational studies and anecdotal reports rather than controlled trials.

The Antimicrobial Resistance Problem

The hidden risk in raw pet food isn't just bacterial contamination — it's that many of those bacteria are resistant to the antibiotics your vet would prescribe if your dog gets sick.

A study published in the Journal of Small Animal Practice tested 51 commercial raw pet food products and found that 62.7% contained antimicrobial-resistant bacteria. More than 60% harbored extended-spectrum beta-lactamase (ESBL) producing E. coli — bacteria that produce enzymes capable of degrading penicillins and cephalosporins, two of the most important antibiotic classes in veterinary medicine.

The ESBL variants detected — CTX-M-1 and CTX-M-15 — are the same enzymes responsible for thousands of human deaths from drug-resistant infections globally. In the United States alone, ESBL-producing bacteria contributed to over 9,000 deaths among hospitalized patients in 2017, according to the CDC.

What makes this particularly concerning is the gene-sharing mechanism. Bacteria can transfer resistance genes to each other like sharing tools from a toolbox. When your dog consumes raw food containing resistant bacteria, those bacteria may transfer resistance genes to other bacteria in your dog's gut. Even after the original infection clears, your dog may now carry additional resistance genes that compromise future treatment options.

Did You Know: In one UK study, 75% of monophasic Salmonella Typhimurium isolates from raw pet food exhibited multi-drug resistance — meaning three-quarters of those Salmonella strains were resistant to four or more classes of antibiotics (APHA, 2026).

Household Safety Assessment

The risk of raw feeding isn't limited to your dog — it extends to every person and animal in your home, with the most vulnerable facing the greatest danger.

The Food Standards Agency's 2025 risk assessment classified the risk of Salmonella infection from raw pet food to dogs as "medium — occurs regularly." But the risk to humans, while rated lower on paper, carries potentially devastating consequences for vulnerable populations.

Children under five, adults over 65, pregnant women, and immunocompromised individuals face the highest risk. The CVMA documented a cluster of human infections acquired through raw pet food contact that resulted in a human fatality. One large epidemiologic study found that close to half of infected dogs showed no symptoms whatsoever.

The contamination pathways are multiple and difficult to fully control. Direct handling of raw food exposes you to pathogens immediately. Dogs that eat raw food may shed bacteria in their saliva and feces. Kitchen surfaces, countertops, and pet bowls become contamination vectors. The FDA specifically warns against kissing dogs around the mouth after they've eaten raw food.

Common Mistakes

"Dogs have stomach acid strong enough to kill bacteria"

What people get wrong: Many raw feeding advocates claim that dogs' highly acidic stomachs neutralize pathogens before they cause harm.

What the evidence says: Dogs do have more acidic stomachs than humans, but this doesn't eliminate Salmonella. A 2022 study found that 33% of dogs fed raw diets actively shed Salmonella in their feces. The bacteria survive the stomach, colonize the intestines, and are shed in stool — often without any clinical signs.

What to do instead: Treat raw-fed dogs as potential pathogen carriers, especially around vulnerable household members.

"Freeze-dried raw is the same as cooked"

What people get wrong: Many owners assume that freeze-dried pet food products have been heat-treated and are therefore safe.

What the evidence says: Freeze-drying is the opposite of cooking. Scientists use freeze-drying to preserve bacteria for long-term storage. Cornell researchers note that bacteria can survive in a dried state for decades.

What to do instead: Read labels carefully. If the product says "raw," "freeze-dried," or "uncooked," treat it with the same caution as fresh raw meat.

"My dog has eaten raw for years without getting sick"

What people get wrong: Long-term raw feeding without apparent illness is used as evidence of safety.

What the evidence says: Subclinical shedding — where dogs carry and transmit bacteria without showing symptoms — is well documented. Nearly half of infected dogs appear healthy.

What to do instead: Request periodic fecal testing from your veterinarian. Absence of symptoms is not absence of risk.

"Only homemade raw is risky — commercial raw is fine"

What people get wrong: Owners assume that commercially produced raw food has undergone safety testing.

What the evidence says: FDA data shows commercially available raw pet food tested positive for Salmonella at 7.7% and Listeria at 16.3%. Other studies found 20-35% of commercial products positive.

What to do instead: Ask manufacturers about pathogen testing protocols, HPP treatment, and AAFCO nutritional adequacy statements.

"Raw is more natural, so it must be better"

What people get wrong: The appeal to nature fallacy — that because wolves eat raw meat, domestic dogs should too.

What the evidence says: Dogs have undergone thousands of years of domestication, including significant genetic adaptations for carbohydrate metabolism. The modern domestic dog is not a wolf.

What to do instead: Base feeding decisions on current evidence for domestic dogs, not assumptions about ancestral diets.

Safety Protocol for Owners Who Choose Raw

If you've reviewed the evidence and still choose to feed raw, these steps can reduce — but never eliminate — the risks to your household.

1. Choose commercial over homemade. Look for products with a nutritional adequacy statement on the label. Homemade diets should only be used under direct supervision of a board-certified veterinary nutritionist.

2. Consider HPP-treated products. High hydrostatic pressure processing at 300-600 MPa can inactivate up to 5-log units of bacteria including Salmonella, Listeria, and E. coli. Some commercial raw brands now offer HPP-treated options.

3. Handle like raw chicken. Use separate cutting boards, utensils, and surfaces. Wash hands thoroughly with soap for at least 20 seconds after handling. Clean and disinfect all surfaces with a bleach solution (1 tablespoon per quart of water).

4. Store and thaw properly. Keep raw food frozen until use. Thaw in the refrigerator — never on countertops. Refrigerate leftovers immediately or discard within 30 minutes.

5. Control the feeding zone. Feed your dog in a designated area that can be easily cleaned. Don't let raw food come into contact with human food preparation areas.

6. Protect vulnerable household members. Children, elderly, pregnant, and immunocompromised individuals should not handle raw pet food. They should avoid contact with the dog's face, mouth, and feces for at least an hour after feeding.

7. Tell your veterinarian. Inform your vet that your dog eats raw food. Request fecal testing for Salmonella at least every 6 months.

8. Monitor for symptoms. Watch for diarrhea, vomiting, lethargy, or loss of appetite. The incubation period for Salmonella is approximately three weeks, making exposure溯源 difficult.

Frequently Asked Questions

Is raw dog food safe for puppies?

No — puppies face higher risk than adult dogs. Their immune systems are still developing, making them more susceptible to bacterial infections. Additionally, puppies cannot safely crush bones, increasing the risk of nutritional imbalances and foreign body obstruction. The WSAVA specifically warns against raw feeding for young animals.

Can dogs get salmonella from raw food?

Yes. Multiple studies demonstrate that dogs fed raw meat diets shed Salmonella in their feces at significantly higher rates than dogs fed conventional diets. One study found 33.3% of RMBD-fed dogs shed Salmonella compared to 0% of kibble-fed dogs. Dogs can carry and shed Salmonella without showing any clinical signs.

What percentage of raw dog food has salmonella?

Studies report contamination rates ranging from 6% to 80%, depending on the product type, country, and testing methodology. The FDA's large-scale study found 7.7% of frozen raw products positive. Other studies of commercial products found rates of 20-35%.

Do any vets recommend raw dog food?

A minority of individual veterinarians do recommend raw diets, often citing anecdotal improvements. However, every major veterinary association worldwide — AVMA, WSAVA, CVMA, BSAVA, AAHA — has issued formal statements advising against raw feeding.

Is freeze-dried raw dog food safer?

No. Freeze-drying preserves bacteria rather than killing them. Cornell researchers note that scientists use freeze-drying to preserve bacterial cultures for long-term storage. Freeze-dried raw treats carry the same pathogen risks as frozen raw food.

Can raw dog food kill my dog?

While fatalities are uncommon, they are documented. Case reports include dogs that died from Salmonella-related sepsis. More commonly, raw feeding causes gastrointestinal illness and carries risk of foreign body obstruction from bone ingestion.

What is the BARF diet for dogs?

BARF stands for Biologically Appropriate Raw Food (or Bones and Raw Food). It's a raw feeding philosophy emphasizing raw meat, bones, fruits, and vegetables. Despite the branding, BARF diets carry the same bacterial contamination and nutritional imbalance risks as other raw feeding approaches.

How do I transition my dog off raw food safely?

Gradual transitions over 7-10 days minimize gastrointestinal upset. Start by mixing 25% new food with 75% current food, gradually increasing the ratio. Consult your veterinarian before transitioning, especially if your dog has been on raw long-term.