Raw Feeding: Separating the Facts from the Fear

Few topics in the pet nutrition world generate as much heat as raw feeding. Mention it in a vet clinic waiting room and you'll likely get a strong reaction one way or the other. Advocates swear by it, citing shinier coats, smaller stools, and pets that finally stopped scratching. Critics point to bacterial contamination, nutritional imbalance, and zoonotic risks. Both sides can sound absolutely certain.

The truth, as with most things in nutrition, is considerably more nuanced than either side tends to admit. My approach is to follow the evidence while also respecting what individual animals actually need, and what's realistic for the people caring for them.

So let's look at this honestly.

What is raw feeding, exactly?

Raw feeding refers to diets built around uncooked meat, bones, and organs, sometimes with added plant matter. The most well-known approach is the BARF diet, which stands for Biologically Appropriate Raw Food (or Bones and Raw Food, depending on who you ask). It typically includes raw muscle meat, raw meaty bones, organ meat, vegetables, eggs, and sometimes dairy.

Another popular approach is the Prey Model Raw (PMR) diet, which aims to mimic the proportions of a whole prey animal more closely, with a higher ratio of meat, bone, and organ and less or no plant matter.

Commercial raw diets also exist, sold as frozen or freeze-dried patties and mixes. These are formulated by manufacturers and are a different product to home-prepared raw, which is assembled by the owner.

The case for raw feeding

The argument most often made in favour of raw feeding is an ancestral one: wolves and wild cats ate raw prey, so domestic dogs and cats should eat raw too. It sounds logical, but this argument has a significant flaw, which I'll come back to.

Setting the ancestral argument aside, there are some genuinely interesting findings on the side of raw feeding. Research has shown that raw-fed animals tend to have higher digestibility of dry matter, protein, and organic matter compared to those eating dry commercial food. This means more of what goes in is actually being absorbed and used. Smaller, less frequent stools are a commonly reported outcome, which reflects that less material is passing through undigested as waste.

There is also credible concern about a process called the Maillard reaction, which occurs when food is cooked at high temperatures. This reaction creates compounds called Advanced Glycation End-products (AGEs), which have been associated with inflammation and cellular damage in some studies. The significance of AGEs in pet food is still being researched, but it raises a reasonable question about what very high-temperature processing does to the nutritional quality of kibble over the course of a lifetime of eating.

Some studies also suggest that raw-fed dogs may have greater diversity in their gut microbiome, which is generally considered a marker of gut health. However, this research is in its early stages and not yet conclusive.

The case against raw feeding

The concerns about raw feeding are real and deserve to be taken seriously, not dismissed as fearmongering.

The most significant is bacterial contamination. Studies have found that approximately 80% of raw BARF-style diets contain Salmonella, and other pathogens including E. coli and Listeria are also common. Healthy adult dogs and cats may shed these bacteria in their faeces without becoming ill themselves. The risk is primarily to the humans in the household, particularly young children, elderly people, pregnant women, or anyone who is immunocompromised. This is not a theoretical risk. It is documented and worth weighing seriously.

The second major concern is nutritional imbalance. Research has found that approximately 60% of home-prepared raw rations are nutritionally deficient when properly analysed. The most common deficiencies are in calcium, phosphorus, iodine, copper, zinc, vitamins D and E, and omega-3 fatty acids. Nutritional imbalances in growing animals are especially concerning, as deficiencies during development can have lasting consequences. This is not a criticism of the concept of raw feeding itself, but of how it is often implemented without proper formulation.

The ancestral argument also doesn't hold up as well as it might seem. Research published in 2013 identified genetic differences between domestic dogs and wolves, specifically in genes involved in starch digestion. Dogs have evolved to process carbohydrates in ways that wolves cannot. This suggests that "what wolves eat" is not necessarily the right benchmark for what domesticated dogs need. Cats are a different case, as obligate carnivores with a much stronger argument for a meat-based diet, but even for cats, the ancestral argument alone is not a complete nutritional framework.

Finally, it is worth noting that the current evidence base for raw feeding is mostly what researchers classify as Level 4 to 7 evidence: lower-quality studies, case reports, and anecdotal observations. There are no large, well-controlled clinical trials demonstrating that raw feeding produces better health outcomes than appropriately formulated commercial food. That doesn't mean the benefits aren't real; it means we can't yet say with scientific certainty that they are.

What about cats specifically?

Cats are obligate carnivores, which means their metabolism is built around animal protein and fat in ways that differ fundamentally from dogs. Cats cannot synthesise certain nutrients from plant precursors the way dogs can. They require taurine, arachidonic acid, and vitamin A directly from animal sources. They also have a limited ability to regulate protein metabolism when dietary protein is low, which is one reason cats on poor-quality, high-carbohydrate diets often become overweight and develop metabolic health problems over time.

This physiology means that a well-formulated raw or minimally processed diet is arguably a better physiological match for a cat than high-carbohydrate dry kibble. Many cats also have low thirst drives and do better with moisture-rich food, which raw and wet diets provide naturally.

That said, the same concerns about bacterial contamination and nutritional balance apply to cats as to dogs. Commercial raw diets designed specifically for cats, formulated to meet AAFCO nutritional profiles, are considerably safer than homemade versions assembled without expert guidance.

Commercial raw vs. home-prepared raw

This distinction matters a great deal, and it is one that often gets lost in the raw feeding debate.

Commercial raw diets sold by reputable manufacturers are formulated by veterinary nutritionists, tested for nutritional completeness, and processed under High Pressure Processing (HPP) or similar methods that reduce bacterial contamination while preserving the integrity of the raw food. These are a fundamentally different product to a raw diet assembled at home from supermarket meat, even if both are described as "raw feeding."

Home-prepared raw feeding, done properly, requires knowledge of nutritional requirements, careful sourcing of ingredients, appropriate ratios of muscle meat to organ to bone, and often additional supplementation. Done without this knowledge, it is where the nutritional imbalance problems predominantly occur.

So what should you actually do?

My honest answer is: it depends on your pet, your household, and what you are realistically able to manage well.

Raw feeding is not a magic solution, and it is not the right choice for every animal or every family. But a thoughtful, well-formulated raw or fresh food diet can genuinely support some pets, particularly those who have struggled on dry commercial food, or cats whose metabolic needs are poorly served by high-carbohydrate diets.

If you are interested in raw feeding, the most important things to do are to start with a reputable commercial raw product rather than building your own from scratch, discuss it with your veterinarian before making the switch, handle raw food with the same hygiene practices you would use for raw meat in your own kitchen, and consider getting a proper nutritional assessment rather than following a generic recipe from the internet.

If raw feeding is not right for your situation, a high-quality wet food, or a dry food with quality ingredients and minimal processing, can also provide excellent nutrition when chosen thoughtfully. The best diet for any individual pet is the one that meets their specific needs, fits safely into your household, and is something you can maintain consistently over time.

What I hope this post has shown is that neither "raw feeding is dangerous" nor "raw feeding is always better" does justice to what the evidence actually says. The truth is more interesting, and more useful, than either extreme.

If you want to work through what the best feeding approach might look like for your specific dog or cat, that is exactly the kind of question I help clients answer in a consultation. Every animal is different, and the right answer for yours deserves more than a generalisation.