Few topics divide pet owners and veterinarians like raw and home-prepared diets. The claims are large — better coats, more energy, cleaner teeth — while the documented risks are narrower but serious: bacterial contamination, nutritional imbalance, and bone injuries. Understanding which risks are supported by evidence, and which benefits are not, lets you decide on facts rather than on either marketing or disapproval.
Some owner-reported changes on raw diets are real but easy to explain. Stool volume and firmness change with any diet that shifts fibre and digestibility. Owners who switch to raw often also reduce treats and measure portions more carefully, and those changes have effects of their own. The real gap is in long-term outcomes: there is currently no robust controlled evidence that a raw diet produces better health across a pet’s life than a complete conventional diet. The claim that dogs are immune to foodborne bacteria because of their digestive tract is also unsupported — documented cases of salmonellosis exist in raw-fed dogs and cats.
Risk 1: Bacterial Contamination Affects the Whole Household
Raw meat carries organisms including Salmonella, Listeria and E. coli, and testing of raw pet food has repeatedly found them at meaningful rates. In one study, 8 of 10 home-prepared raw chicken diets for dogs grew Salmonella. In another, all 25 commercial raw diets sampled contained coliform bacteria above the hygiene threshold used for raw meat. A larger survey of 240 samples from 20 commercial raw diets found non-type-specific E. coli in more than half, and Salmonella enterica in about 7%.
The part owners most often miss is that this is not only a pet problem. Raw-fed animals can shed these organisms in their faeces without looking ill, so exposure reaches the people in the home. Freezing, freeze-drying and dehydrating reduce bacterial loads but do not reliably kill everything on the food.
Risk 2: Nutritional Imbalance, Especially in Home-Made Recipes
Analyses of home-prepared recipes, including popular published ones, repeatedly find deficiencies and excesses. The most common failures are calcium and phosphorus balance, vitamin D, vitamin A and trace minerals. In one evaluation, a commercial raw food had a calcium-to-phosphorus ratio of 0.15 against a target around 1.2–1.4, alongside excessive zinc and vitamin D.
Growing puppies and kittens are the most vulnerable group, because skeletal development is unforgiving about calcium and the consequences are not reversible once growth plates close. Cooking also does useful work that raw feeding skips: heat destroys thiaminase, the enzyme in some raw fish and seafood that breaks down thiamine and can cause deficiency in cats.
Risk 3: Bones Cause Real Injuries
- Weight-bearing and whole bones fracture teeth
- Bone fragments cause choking, constipation and intestinal obstruction
- Perforation of the gut is uncommon but life-threatening
- Cooked bone is more brittle and more dangerous than raw, and should never be fed
If You Still Want to Feed Raw or Home-Cooked
- Prefer a nutritionally complete commercial raw product over a recipe from a book or a forum.
- If you home-prepare, have the recipe formulated or reviewed by a veterinary nutritionist rather than trusting an ingredient list that only looks balanced.
- Handle the food exactly like raw meat for people: thaw in the fridge and never on the counter, use separate boards and utensils, and wash hands, surfaces and bowls in hot soapy water after every meal.
- Do not leave raw food down between meals.
- Protect vulnerable household members — keep raw-fed pets away from infants and immunocompromised people, discourage face licking, and pick up faeces promptly.
- Skip bones, or get specific veterinary advice on which are appropriate.
- Keep parasite prevention current, and tell your vet, boarding facility, groomer and daycare that your pet is raw-fed, because it changes how a stomach upset is investigated.
Who Should Not Be Fed Raw
For some households the risk balance is clearly unfavourable: pets on immunosuppressive medication, pets with cancer under treatment, pets with existing gastrointestinal disease or pancreatitis, and any pet living with an infant, a pregnant person or someone who is immunocompromised. A nutritionally complete conventional diet is the safer default in all of those situations.
Raw feeding is a genuine point of disagreement, and it is not improved by avoiding the conversation. If you want to feed this way, tell your veterinary team what you are feeding and why. The two risks with the best evidence behind them — contamination, and imbalance in home-made recipes — are both manageable, but only if somebody knows they are there.