How to choose a dog
digestive supplement.

01

Know what you are buying

“Digestive supplement” describes a broad category. Products can contain fibre, live microorganisms, other nutrients or combinations of ingredients. They are not all probiotics, and they are not interchangeable.

Look for the product’s legal description. A complementary feed is given alongside other food; it is not a complete diet. UK Pet Food explains the distinction. The Veterinary Medicines Directorate’s guidance also distinguishes health-maintenance claims for non-medicinal products from claims to treat or prevent disease. A supplement label is not a veterinary diagnosis.

For a closer look at those terms, read complete versus complementary dog food. For the practical differences between formats, see dog supplement chews versus powders.

02

Read beyond the front of the pack

Find the composition, additives, analytical constituents, feeding instructions and responsible company’s contact details. Check the batch and best-before information when the product arrives. According to UK Pet Food’s labelling guidance, composition lists ingredients in descending order by weight; individual names or permitted category names may be used.

Read the whole list, including the ingredients that give a chew its flavour and texture. If your dog avoids a particular ingredient, ask the manufacturer about any unclear category. Keep a photograph of the label so you can share the exact product with your vet.

03

Put the numbers in context

An amount per kilogram of product is different from an amount per chew or daily serving. Ask for the recommended serving and the units before comparing two labels.

For products containing live microorganisms, look for their identity, including the strain designation where provided, and the stated quantity. CFU means colony-forming units: a way of expressing viable microorganism counts. Ask whether the stated count applies at manufacture or through the stated shelf life, and follow storage instructions. A larger CFU figure alone does not establish a better choice for your dog.

04

Ask what was actually studied

When a brand cites research, compare the studied strain or complete formula, daily amount, dogs enrolled, study duration and measured outcome. Evidence about one ingredient does not automatically establish the performance of another finished product containing it.

For example, a 2021 randomised trial studied a particular multi-species synbiotic for four weeks in healthy household dogs. A 2023 randomised trial tested a named Bacillus subtilis strain over 45 days in ten healthy Beagles. These are different interventions and populations. Neither study tests WILDRYN.

Check who funded the work and whether results describe something owners notice or a laboratory measurement. A change in a microbiome measurement is not, by itself, proof of a meaningful everyday benefit. Ask the seller for the actual paper and an explanation of how it relates to their product.

05

Check the fit for your dog

Confirm the intended species, minimum age, daily amount, storage conditions and any cautions. Check the instructions against your dog’s current food, treats and other supplements so you know what you are adding.

Speak to your vet before choosing a supplement if your dog has an existing health condition, takes medicine, follows a veterinary diet, or you are unsure about suitability. If your dog seems unwell or has persistent or worrying digestive changes, contact your vet rather than relying on a shopping decision.

06

Compare the cost per day

Divide the pack quantity by your dog’s daily amount to find the days per pack. Then divide the price by those days. For illustration, 60 chews at two per day last 30 days: a £30 pack would cost £1 per day, before delivery. These are example figures, not WILDRYN prices or feeding directions.

You cannot calculate a reliable daily cost until the serving is known. Include delivery charges and check whether a displayed price requires a subscription. Read the renewal frequency and cancellation terms before deciding.