What is Chicory Root in Dog Food and why does it matter?

At a glance

• Chicory root is one of the richest natural sources of inulin, a prebiotic fibre that feeds beneficial gut bacteria and supports digestive health in dogs
• Prebiotics like inulin are different from probiotics: prebiotics feed the beneficial bacteria already present in the gut rather than introducing new ones
• Regular chicory root intake is associated with improved stool consistency, reduced digestive upset, and stronger immune function in dogs
• Chicory root is safe for most dogs in the amounts used in complete dog food recipes; very high quantities can cause loose stools in sensitive dogs
• Chicory root is included in every Marleybones Pantry Fresh® recipe as one of seven functional plant-based ingredients, alongside quinoa, chia seeds, hemp seeds, and linseeds

What is chicory root and where does it come from?

Chicory (Cichorium intybus) is a flowering plant native to Europe, widely cultivated for both its leaves and its root. The root has been used in human food and medicine for centuries, most famously as a coffee substitute, but its nutritional significance in dog food comes from its exceptionally high inulin content. Chicory root typically contains between 15–20% inulin, making it one of the most concentrated natural sources of this prebiotic fibre available.

In dog food, chicory root is typically included in dried or powdered form. It has a mild, slightly bitter flavour that does not significantly affect palatability at the quantities used in complete recipes, and it remains effective through gentle cooking processes. In Marleybones Pantry Fresh® meals, it survives the in-pack steam cooking at 89°C with its functional properties intact.

What is inulin and what does it do in a dog's gut?

Inulin is a soluble, fermentable dietary fibre that dogs cannot digest directly with their own digestive enzymes. Instead, it passes through the small intestine largely intact and reaches the large intestine, where it is fermented by beneficial bacteria, particularly Bifidobacterium and Lactobacillus species. This fermentation process produces short-chain fatty acids, which lower the pH of the gut environment, making it less hospitable to harmful bacteria and more supportive of the beneficial strains.

The practical result is a more balanced gut microbiome: beneficial bacteria thrive, harmful bacteria are crowded out, and the gut lining is better supported. This has downstream effects on stool consistency, immune function (a significant proportion of the immune system is located in the gut), and the dog's ability to absorb nutrients from its food. Dogs with a healthier gut microbiome tend to produce firmer, more consistent stools, experience fewer episodes of loose stools or digestive upset, and show better overall coat and skin condition over time.

"Chicory root is relevant because inulin gives the large-intestinal bacteria a specific fermentable substrate. At the right inclusion level, that can influence short-chain fatty acid production, fecal metabolites and stool consistency."

Dr. Davide Stefanutti DVM PhD

What is the difference between a prebiotic and a probiotic?

This is one of the most commonly confused distinctions in dog nutrition. Probiotics are live bacteria introduced to the gut from outside, typically through supplements or fermented foods. Prebiotics are the food that beneficial bacteria eat. Chicory root is a prebiotic: it does not introduce bacteria but creates conditions in which the bacteria already present in the gut can thrive.

Both have a role in gut health, and they work well together. A probiotic supplement introduces beneficial bacteria; a prebiotic like inulin gives those bacteria the fuel to establish and multiply. For dogs whose gut microbiome is broadly healthy but benefits from ongoing support, a diet that includes a reliable prebiotic source is often more practically useful than occasional probiotic supplementation.

Is chicory root safe for dogs?

Yes, in the quantities used in complete dog food recipes. Chicory root has a long history of safe use in both human and animal nutrition, and there are no known toxicity concerns at normal dietary levels. 

The one practical consideration is that very high quantities of inulin can cause loose stools or flatulence in sensitive dogs, because the fermentation process in the large intestine produces gas as a byproduct. At the levels included in a balanced complete recipe, this is not typically an issue. Dogs transitioning to a diet that includes chicory root for the first time may experience minor digestive adjustment in the first week or two, which usually settles as the gut microbiome adapts.

Why do some dog foods include chicory root while others don't?

Chicory root costs more than standard fillers and requires careful formulation to include at effective levels without causing digestive upset in sensitive dogs. Brands that prioritise functional ingredients include it deliberately; brands focused on cost reduction tend to rely on cheaper fibre sources that do not offer the same prebiotic benefit.

The presence of chicory root in a recipe is a useful signal about a brand's approach to formulation. It suggests the recipe was designed with digestive outcomes in mind, not just macronutrient targets. Marleybones includes chicory root in every Pantry Fresh® recipe alongside six other functional superfoods: quinoa, chia seeds, hemp seeds, linseeds, yucca, and a further botanical blend. In the Marleybones customer survey of 1,056 subscribers, 71% reported better digestion and stool quality after switching, which reflects the cumulative effect of this approach to formulation.

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FAQs

Is chicory root the same as chicory extract?

Chicory root and chicory extract are related but not identical. Chicory root refers to the whole dried root, which contains inulin alongside other fibres and compounds. Chicory extract or chicory root extract is a more concentrated form that has had the inulin isolated to a higher purity. Both are used in dog food; the extract is more concentrated and may be included at smaller quantities to achieve the same prebiotic effect.

Can chicory root help dogs with sensitive stomachs?

Yes, for most dogs with sensitive stomachs, chicory root is beneficial rather than problematic. The prebiotic effect supports a more balanced gut microbiome, which reduces the susceptibility to digestive upset from dietary variation or stress. Dogs with extremely sensitive digestion may need a gradual introduction to chicory root-containing diets, but the long-term gut health benefit is well established.

Does chicory root help with dog allergies?

Chicory root does not directly address food allergies, which are immune responses to specific proteins. However, a healthier gut microbiome supported by prebiotic intake is associated with better immune regulation overall, which can reduce the severity of inflammatory responses in some dogs. If your dog has a confirmed food allergy, the priority is identifying and eliminating the trigger protein; chicory root supports the gut environment around that primary intervention.

Is chicory root in Marleybones meals?

Yes. Chicory root is included in every Marleybones Pantry Fresh® recipe as one of seven functional plant-based ingredients. It is present alongside quinoa, chia seeds, hemp seeds, linseeds, and yucca, all of which are included for specific nutritional or digestive reasons rather than as marketing additions.

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Reviewed by Dr Davide Stefanutti DVM, PhD, Veterinarian Nutritionist

REFERENCES

Propst, E. L., Flickinger, E. A., Bauer, L. L., Merchen, N. R., & Fahey Jr, G. C. (2003). A dose-response experiment evaluating the effects of oligofructose and inulin on nutrient digestibility, stool quality, and fecal protein catabolites in healthy adult dogs. Journal of animal science, 81(12), 3057-3066.

Alexander, C., Cross, T. W. L., Devendran, S., Neumer, F., Theis, S., Ridlon, J. M., ... & Swanson, K. S. (2018). Effects of prebiotic inulin-type fructans on blood metabolite and hormone concentrations and faecal microbiota and metabolites in overweight dogs. British Journal of Nutrition, 120(6), 711-720.

Pinna, C., Vecchiato, C. G., Bolduan, C., Grandi, M., Stefanelli, C., Windisch, W., ... & Biagi, G. (2018). Influence of dietary protein and fructooligosaccharides on fecal fermentative end-products, fecal bacterial populations and apparent total tract digestibility in dogs. BMC veterinary research, 14(1), 106.