You can tell a lot about a dog in the ten seconds you spend picking up after them, and most owners are already doing it without calling it anything. Something looks different. The question arrives before you have finished: is that normal, or is that a problem?
Stool is one of the few things about your dog you can observe every day, and it costs nothing to look. This is a guide to reading it calmly. What changes when the food changes, what the evidence actually supports, and the small number of things worth a call to your vet rather than a search.
Why the food changes the stool
Stool contains what was not absorbed, alongside water, bacteria and material from the gut itself. Change the food and you change that mix, so the stool can change with it. That is true of any switch, not only a switch to raw.
Digestibility is one major lever. Foods differ in how much of what goes in is actually taken up, and in how much indigestible material they carry through. The evidence on raw and cooked foods is set out in Raw vs Cooked Dog Food: What the Evidence Shows, so this piece takes the conclusion and moves on.
Two things follow. A change after a change of food is expected rather than alarming. And the stool is telling you about the food and the dog at the same time, which means separating the two is the whole skill.
What the studies actually show
A 2024 controlled study at the University of Illinois compared five commercial formats in ten beagles, each fed for 35 days. Dogs on the kibble diet produced around 90 grams of stool a day. Dogs on the frozen raw diet produced 37. Stools on the frozen and freeze-dried raw diets were firmer on average than stools on the kibble diet, though every group's average score sat inside the normal range.
A 2018 study did not find lower stool output for its raw diet. Raw output was 101.6 grams a day, compared with 84.3 for the kibble diet, but the study found no statistical difference in as-is or dry-matter output across the four foods tested. The 2024 authors point to differences in food intake and formulation as likely explanations for the gap between studies.
So "raw means smaller, firmer stools" is not a general rule the evidence supports. It happened in one study and not in the other. Both used small groups of beagles fed a single product per format, and those products differed in fibre, fat, protein and moisture all at once, which makes processing impossible to separate cleanly from recipe. In the 2024 study, one freeze-dried raw diet produced the most variable stools of the five, with several individual scores outside the normal range, and the authors record cyclical bouts of diarrhoea in most of the dogs eating it.
The useful conclusion is that the direction of change belongs to the recipe rather than to the category. That includes ours. Nothing above is a prediction of what any particular food will do to your dog.
The white stool question
Pale, chalky stool is commonly reported in dogs fed diets containing bone, and the usual explanation is undigested mineral residue. That account is repeated widely and it is plausible, but it is not well documented. Treat it as the common explanation rather than an established fact.
Two things are separate from it. Stool left outside goes pale on its own as it dries, which is not about your dog at all. And stool that is persistently pale or putty-coloured when freshly passed is a different matter, because disrupted bile flow can produce pale faeces. That one belongs in the list at the end.
None of this is a dial to adjust. On a complete recipe that stays the same, mineral content is a formulation decision made once, not something you manage meal to meal. If stools are consistently hard, or your dog strains to pass them, notice it. It is not an invitation to start rebalancing the bowl. The amount in the bowl is a separate question, covered in How Much Raw Food Should I Feed My Dog? You can also use the feeding calculator to work from your dog's details.
Learning your dog's normal
The practical tool is a faecal scoring chart. Purina and Waltham each publish one free of charge, both running from hard and dry at one end to liquid at the other. Either works, and consistency matters more than which you pick.
The charts have known limits. In a 2021 study, three vets scoring the same 126 stools agreed with one another only fairly to substantially, and agreement between the vets and members of the public was weaker still. Scoring became more consistent with experience.
That is encouraging rather than the opposite. The number is not a clinical measurement, so precision was never the point. Using the same chart every time, so that today's score means the same thing as last month's, is.
What this means for you: Pick one chart and keep it. After any change of food, note the score each day. You are not diagnosing anything. You are building a reference.
Why a settled diet is a better instrument
What limits the value of a daily look is noise. Treats, a mouthful of something on a walk, a stressful week, a course of medication, how much they drank, a passing bug. All of it moves the picture, and so does changing what is in the bowl.
A diet that stays the same removes one large source of that variation. It does not remove the others, and anyone claiming that a single recipe turns stool into a clean readout is overselling it. What a settled diet does is let your dog establish a familiar pattern, so that a departure from it is easier to notice and more useful to look into. Over months, that tells you more than any general rule about what raw stool looks like.
One caution in the other direction. Firm stool is not evidence that a food is nutritionally complete, and it is not evidence that a batch is free of contamination. Those are separate assurances, established in different ways, and neither of them is visible in the garden. Stool is not a substitute for checking body condition either; Managing Your Dog's Weight on Raw Food covers that separately.
When it is worth a call
Most changes are not emergencies, and a short list is more useful than a long one. Clinical guidance grades digestive upset mainly by how the dog is rather than by how the stool looks: general condition, hydration, and whether there are signs of illness beyond the gut. That is the right frame at home as well. The dog matters more than the sample.
Worth a call to your vet: Blood in the stool, whether fresh and red or black and tarry. Diarrhoea alongside a change in the dog, such as lethargy, refusing food, repeated vomiting, or signs of abdominal pain. Diarrhoea that does not settle, straining that is persistent rather than occasional, or fresh stool that is persistently pale.
Blood stays on that list even when the dog seems well, because appearance alone cannot tell you why it is there or how much it matters. That is exactly the distinction your vet can make, which is what makes the call an answer rather than a precaution.
A change while your dog is moving onto raw is a different context. Week 1 on Raw covers the transition itself, and The First Month of Raw Feeding follows what changes after it.
Most days, none of this needs doing. You glance, it looks like it usually looks, and you carry on. That is the whole point of knowing what usual looks like.