Do Dogs Need Carbohydrates in Their Diet?

At a glance

• Dogs have no minimum dietary requirement for carbohydrates — protein and fat alone can meet their energy needs
• Quality carbohydrates still provide real benefits: sustained energy, digestive fibre, and essential micronutrients
• Not all carbs are equal — whole food sources like sweet potato and oats are very different from refined fillers like wheat flour
• Fibre is a carbohydrate, and it plays a direct role in gut health and stool quality
• A high-carbohydrate diet built around cheap fillers is a problem; a balanced diet that includes quality carbs is not

Do dogs actually need carbohydrates?

Dogs do not need carbohydrates the way they need protein or fat. There is no recognised minimum carbohydrate requirement in canine nutrition guidelines. Dogs can produce glucose — the fuel their cells run on — from protein and fat through a process called gluconeogenesis (making new glucose from non-carb sources). So strictly speaking, carbs are not essential.

That said, "not essential" is not the same as "bad." The debate around carbs in dog food often swings between two extremes: that carbs are fillers to be avoided, or that they are a perfectly fine energy source at any level. The honest answer sits in the middle.

Dogs are not obligate carnivores like cats. Over thousands of years of domestication alongside humans, dogs developed the ability to digest starch far more efficiently than wolves. They carry extra copies of the amylase gene, which produces the enzyme that breaks down starch in the gut. This is not a loophole in their biology — it is an adaptation that makes moderate carbohydrate intake genuinely workable for most dogs.

What do carbohydrates actually do in a dog's diet?

When carbohydrates come from quality whole food sources, they bring more than just calories. Sweet potato, for example, delivers complex carbohydrates alongside beta-carotene and potassium. Brown rice provides easily digestible energy that is easy on the gut. Oats offer slow-release carbohydrate with a useful hit of soluble fibre.

Fibre deserves specific mention here because it is technically a carbohydrate, just one the body does not fully digest. Soluble fibre feeds the beneficial bacteria in your dog's gut — this is called a prebiotic effect. Insoluble fibre adds bulk to stools and keeps things moving. The role fibre plays in digestive health is often underestimated in conversations about low-carb or raw diets.

The concern with carbohydrates in commercial dog food is rarely about carbs themselves. It is about how much space they take up, and what they displace. A food that is 60% refined grain by weight has very little room for meaningful protein or fat. That is the filler problem — not carbohydrates as a category.

Which carbohydrates are worth including and which are not?

This is where quality really matters. There is a significant difference between a dog food that includes sweet potato and quinoa, and one padded out with wheat flour and corn syrup solids.

Carbohydrate sources worth including:

• Sweet potato — complex carbs, beta-carotene, easy to digest
• Brown rice — gentle on the gut, good for dogs with sensitive stomachs
• Oats — soluble fibre, slow-release energy
• Quinoa — provides carbohydrate alongside a useful amino acid profile
• Chicory root — a prebiotic fibre source that feeds gut bacteria directly

Carbohydrate sources to question:

• Wheat flour, corn flour, and soy — cheap bulk ingredients that displace more nutritious food
• Refined starches used primarily to bind kibble together during processing
• Any ingredient where the carbohydrate source is listed multiple times under different names to obscure how dominant it is

Marleybones recipes include superfoods like quinoa, chicory root, and chia seeds — carbohydrate-containing ingredients chosen for their nutritional contribution, not to fill out weight. The recipes are vet-developed and FEDIAF compliant, meaning the macronutrient balance meets established nutritional standards rather than following trends. The full range of meals reflects that approach across every protein option.

Should some dogs eat fewer carbohydrates?

For most healthy dogs, carbohydrate intake is not something that needs obsessive management provided the overall diet is balanced and the sources are quality ones.

There are situations where lower carbohydrate intake is worth considering. Dogs with diabetes benefit from diets that produce a steadier blood glucose response, which means limiting rapidly digested starches. Overweight dogs sometimes do better with reduced carbohydrate, since it can help lower calorie density without cutting protein. Dogs with certain digestive conditions may also respond better to a lower-starch diet.

If your dog has a diagnosed condition that might be affected by carbohydrate intake, your vet is the right person to advise on the specific balance that suits them — general guidance does not substitute for individual assessment.

For active, healthy dogs, the more relevant question is not "how many carbs?" but "what are those carbs doing?" A food that uses whole food carbohydrate sources rather than heavily processed starch will deliver a meaningfully different nutritional outcome, even at a similar carbohydrate percentage on paper.

What does a balanced approach actually look like?

A well-formulated dog diet prioritises high-quality protein and appropriate fat, then uses carbohydrates to fill a supporting role — energy, fibre, and micronutrients — without letting them dominate the bowl.

That means carbohydrates should appear in a dog food because they contribute something, not because they are cheap. It also means the fear of any carbohydrate in any amount is not well-supported by nutritional science. Dogs have the digestive machinery to handle moderate starch intake. They just do not thrive on a diet where starch is the main event.

Reading an ingredient list with that lens is useful. Look at where the carbohydrate sources appear, how many there are, and what they are — the format of a food also affects how those ingredients are processed and what nutritional value actually reaches your dog.

Every dog is different — build your personalised Marleybones feeding and health plan tailored to your dog's age, size, and health requirements.

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FAQs

Can dogs live without carbohydrates in their diet?

Yes. Dogs can meet all their energy needs from protein and fat, and there is no minimum carbohydrate requirement in canine nutrition guidelines. That said, removing carbohydrates entirely also removes fibre, which plays a useful role in gut health and digestion.

Are carbohydrates bad for dogs?

No. Quality carbohydrates from whole food sources are not bad for dogs. The problem in many commercial dog foods is not carbohydrates as a category but the use of cheap, refined carbohydrate sources in excessive amounts that displace more nutritious ingredients.

Do dogs digest carbohydrates well?

Yes, better than most people expect. Dogs carry extra copies of the amylase gene compared to wolves, which means they produce more of the enzyme that breaks down starch. This is a genuine evolutionary adaptation to a human-adjacent diet.

How much carbohydrate should a dog's food contain?

There is no single correct answer. What matters more than a specific percentage is the source and quality of the carbohydrates. A diet where 20-30% of calories come from whole food carbohydrate sources is quite different from one where 50-60% comes from refined grain fillers.

Does Marleybones include carbohydrates in its recipes?

Yes. Marleybones Pantry Fresh meals include carbohydrate-containing ingredients like quinoa, chicory root, and chia seeds. These are included for their nutritional contribution rather than as bulk fillers. All recipes are vet-developed and complete for all life stages.

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