Switching your dog to a raw diet: what you need to know

Raw feeding has gone from a niche hobby to a genuine mainstream choice for UK dog owners, with butchers, specialist suppliers and even some supermarkets now stocking frozen raw meals for dogs. If you're curious about switching, or a friend has raved about how well their dog is doing on raw, it's natural to want to know what's actually involved before you change anything.

This guide walks through what a DIY raw diet means in practice, the genuine benefits owners report, the risks that vets consistently flag, and how to make any switch as safely as possible if you decide to go ahead. It's written to help you make an informed decision, not to tell you what to do — raw feeding is a personal choice, and a well-run raw diet looks very different from a poorly balanced one.

Whatever you choose, the two things that matter most are nutritional balance and hygiene. Get those right and you remove most of the risk; skip them and you introduce real problems for your dog and your household.

What counts as a raw diet for dogs

"Raw feeding" covers a range of approaches, and the differences matter because they carry different risks.

• BARF (Biologically Appropriate Raw Food) mixes raw muscle meat, raw meaty bones, organ meat, and some fruit, vegetables or supplements, aiming to mimic a balanced ancestral diet.
• Prey model raw (PMR) sticks closer to whole prey ratios — roughly 80% muscle meat, 10% bone, 5% liver and 5% other organ — with no fruit, vegetables or grains.
• Commercial raw is pre-mixed, complete and balanced frozen or freeze-dried food made by a manufacturer, sold in trays or patties, and formulated to meet recognised nutrient standards.
• DIY home-prepared raw is anything you assemble yourself from butcher's meat, offal and bone without a fixed, tested recipe.

This last category — DIY home-prepared raw — is where the real nutritional risk sits. The Food Standards Agency describes raw pet food as "unprocessed or uncooked meat, offal and raw bone," alongside sometimes-uncooked fruit, vegetables, oils, nuts, seeds and eggs, and it's this uncooked, unregulated preparation at home that both increases the chance of bacterial contamination and makes it easy to under- or over-supply key nutrients.

Why owners choose to switch

Owners who feed raw commonly report a glossier coat, smaller and less smelly stools, better breath, more energy and, in some cases, improved skin. These are real, widely reported observations, and they're one reason raw feeding has grown so much in the UK.

It's worth being honest about the evidence, though. PDSA vets are clear that "there are no studies to support that raw feeding is better than traditional dog food," and add that many of the improvements owners notice with raw can be achieved just as well by making sure a dog is on any high-quality, complete and age-appropriate diet — raw or not. In other words, some of what looks like a "raw diet benefit" may really be a "finally-balanced-and-appropriate diet benefit."

That doesn't mean raw feeding has no place — plenty of dogs do well on a properly formulated raw diet, and some owners have valid reasons for choosing it (known food sensitivities, personal ethos around processed food, or simply wanting more control over ingredients). It does mean you shouldn't switch expecting raw itself to be a cure for an unrelated health issue, and if your dog has a diagnosed condition, loop your vet in before changing anything.

The risks you need to know about

This is the section vets spend most time on, because the risks are well documented even where the benefits aren't.

Bacterial contamination is the headline concern. A 2023 UK study from the University of Liverpool, published in *Frontiers in Microbiology*, tested 110 raw meat diet (RMD) samples and 24 cooked kibble samples from the most popular UK dog food brands. The results were stark: 24.5% of raw samples had *E. coli* counts high enough to fail Defra's own hygiene testing thresholds, 30.9% exceeded acceptable levels for other Enterobacteriaceae, and Salmonella was detected in 4.5% of raw samples. Not a single Enterobacteriaceae organism was isolated from any of the 24 cooked kibble samples. The same study found antimicrobial-resistant *E. coli* in 39.1% of raw samples, including strains resistant to critically important human antibiotics.

VCA Hospitals reports similarly: in testing of raw pet food samples, "nearly 25% tested positive for harmful bacteria, including Salmonella and Listeria monocytogenes." Dogs fed raw can shed these pathogens in saliva and faeces even without showing symptoms themselves, which is how the risk spreads to other pets and to people in the household.

The BVA's own guidance is blunt about the organisms involved: raw meat "will not be killed off" of pathogenic and zoonotic bacteria including *E. coli*, Salmonella, Listeria, Campylobacter and Clostridia. Its author states plainly, "I would not be persuaded to feed my own dog or cat a raw meat diet" — while acknowledging that owners who do choose raw are entitled to make that decision with the right precautions.

Nutritional imbalance is the second major risk, and it's arguably the one that catches out well-meaning DIY feeders most often. Getting the ratio of calcium to phosphorus wrong, under-supplying key vitamins, or relying too heavily on muscle meat without enough organ meat and bone can cause real, sometimes serious, deficiencies over time — particularly in growing puppies. PDSA advises that "without help from a specialist in pet nutrition a homemade diet could be nutritionally unbalanced which can cause your pet to become ill," and recommends against DIY raw or cooked home preparation for exactly this reason.

Nutritional balance: getting it right

If you do decide to feed raw, the single biggest safeguard against nutritional problems is choosing a commercially prepared, complete and balanced raw food rather than assembling your own recipe from scratch. Reputable commercial raw brands formulate to recognised nutrient profiles (such as FEDIAF standards in the UK/EU) and test batches, which a home kitchen simply can't replicate.

If you're committed to DIY raw, work with a qualified veterinary nutritionist to design a recipe rather than following a generic online template — recipe requirements change with a dog's age, size, breed, activity level and health status, and "roughly 80/10/10" rules of thumb don't account for individual needs. Puppies in particular need carefully controlled calcium and phosphorus levels for healthy bone growth; getting this wrong is one of the most common and most serious DIY raw mistakes.

Whatever the format, keep an eye on your dog's overall condition — coat, weight, energy and stool quality are useful day-to-day indicators, and our Pet Calorie Calculator can help you work out a sensible daily calorie target so portions stay in the right range as you adjust.

Bones: what's safe and what isn't

Raw meaty bones are part of some raw feeding philosophies, included for dental benefit and as a natural calcium source, but vets are notably cautious here. PDSA's position is the most conservative and worth taking seriously: it "does not recommend feeding your pet bones ever, regardless if they are cooked or uncooked," because bones can lodge in the stomach or gut and cause a blockage, or splinter and damage the digestive tract internally.

If you do choose to include raw bone as part of a raw diet, general good practice from raw-feeding sources includes only ever offering raw (never cooked) bone, always supervising your dog while they have it, choosing a bone appropriately sized for your dog (too small is a choking risk, too hard can fracture teeth), and removing it once the soft cartilage has been eaten rather than leaving a bare, hard bone available. If your dog gulps food rather than chewing, is a strong resource-guarder around food, or has a history of pancreatitis or dental disease, bones bring extra risk and are best avoided or discussed with your vet first.

Making the switch safely

If you've weighed the risks and benefits and decided to go ahead, how you switch matters as much as what you switch to.

• Choose your format first. A complete, commercial raw diet removes most of the nutritional-balance risk and is the more forgiving starting point.
• Transition gradually. A steadier changeover over 7–10 days, replacing roughly a quarter of the old diet with raw every couple of days, is kinder to the gut than a sudden switch. Older dogs or those with digestive issues often need an even slower transition.
• Start with a single, lean protein such as chicken or turkey, which tends to be easier on digestion than fattier meats like lamb, then introduce variety once things settle.
• Watch stool, appetite and energy closely for two to three weeks. Some initial loosening isn't unusual, but ongoing diarrhoea, vomiting, lethargy or a dog going off food isn't a "detox" to push through — slow down and speak to your vet if it doesn't settle quickly.
• Introduce new proteins one at a time, a few days apart, so any reaction is easy to trace.

Safe handling and hygiene at home

Because raw food carries a real risk of pathogens that cooking would normally destroy, safe handling at home isn't optional — it protects your dog and everyone else in the house.

Government guidance from the Food Standards Agency recommends that owners freeze raw pet food until it's needed and label it clearly, store it on the lowest shelf of the fridge so it can't drip onto other food, and use dedicated utensils, bowls and containers kept separate from anything used for human food. After handling or preparing raw pet food, wash your hands thoroughly with soap and hot water, and clean and disinfect any surface the food has touched.

The BVA's practical advice adds a few more habits worth building in: give food a sensory check before feeding, keep it well away from human food in the fridge, avoid preparing it near where you cook your own meals, and always tell your vet your dog is raw-fed if they become unwell, since it can change what's considered in diagnosis. Uneaten food should be discarded promptly, bowls washed immediately after each meal, and any surfaces or bedding your dog has licked cleaned regularly too — pathogens can transfer this way even without direct contact with the raw food itself.

Who should think twice about raw feeding

Raw feeding brings genuinely higher risk for some households, and it's worth being honest about who that includes.

FSA guidance specifically flags extra caution around children under five, elderly household members, pregnant people, and anyone who is immunocompromised, because these groups are more vulnerable to the foodborne pathogens raw pet food can carry. If any of these apply in your home, it's worth discussing raw feeding with your vet and, where appropriate, your GP or midwife before starting, and being especially rigorous about hygiene if you do proceed.

Puppies are a separate consideration again: their nutritional requirements are tighter and less forgiving of imbalance than an adult dog's, particularly for calcium and phosphorus during the growth phase, so DIY raw recipes are riskier for puppies than for settled adults. A complete, commercially formulated raw diet specifically designed for growth, agreed with your vet, is the safer route if you want to raw-feed a puppy.

Dogs with a compromised immune system, dogs on immunosuppressant medication, and dogs with a history of pancreatitis (given the often higher fat content of some raw diets) are all worth discussing with your vet before switching, as are households with other pets who might come into contact with raw food or a raw-fed dog's saliva and faeces.

Common mistakes to avoid

Most raw-feeding problems trace back to a small number of avoidable mistakes:

• Treating "raw" as automatically balanced. Raw isn't a nutrient profile — a diet can be entirely raw and still badly imbalanced if the ratios are wrong.
• Skipping organ meat, which supplies vitamins and minerals that muscle meat alone doesn't provide in sufficient quantity.
• Feeding cooked bones, which are more likely to splinter than raw ones and should never be given.
• Storing raw food incorrectly — leaving it out too long, refreezing after thawing, or letting it sit near human food in the fridge.
• Ignoring early warning signs like persistent soft stool, weight loss, or a dull coat, and pushing on regardless rather than reassessing the diet.
• Switching a puppy or unwell dog to a DIY recipe without professional input, when the margin for nutritional error is smallest.

When to see your vet

Speak to your vet before switching your dog to any raw diet, and sooner rather than later if you notice ongoing vomiting, diarrhoea, weight loss, lethargy, a dull or flaky coat, or any change in stool that doesn't resolve within a few days of a diet change. These can signal either a normal but poorly managed transition or a genuine nutritional or infectious problem, and a vet can help tell the difference — including running tests if a pathogen like Salmonella or *E. coli* is suspected, which matters for treating your dog and protecting your household. If you're simply unsure whether raw feeding is right for your dog's age, breed, or health history, that's also a good reason for a conversation before you start, not after.

*This is general guidance, not a substitute for advice from your vet, who can assess your individual pet.*

Sources

• PDSA — raw diets advice for pets (pdsa.org.uk).
• VCA Animal Hospitals — "Dogs and Raw Food Diets" (vcahospitals.com).
• Food Standards Agency / GOV.UK — raw pet food guidance on safe handling and storage (gov.uk).
• University of Liverpool, published in *Frontiers in Microbiology* (2023) — study of Enterobacteriaceae and antimicrobial resistance in UK raw and cooked dog food (frontiersin.org).