Changing a working dog’s food

Identify the reason

Write down whether the change is for life stage, availability, a veterinary plan or an unresolved concern. Cornell’s diet-review guidance discusses problems associated with switching too quickly. Keep the reason distinct from a diagnosis: loose stool after a change does not establish an ingredient allergy or prove a particular brand is responsible.

Check both diets

Record the exact old and proposed foods, intended use and amount offered. Confirm that the replacement serves the same nutritional purpose where that is the goal. A new flavour in the same range and a different diet formulation are not automatically equivalent changes, especially where health or growth is involved.

Agree the approach

Seek an individual transition plan where the dog has illness, previous problems or a prescribed diet. Keep the plan clear enough that everyone feeding the dog follows the same sequence. Do not add several supplements or new treats at once without recording them, because that makes a later concern harder to interpret.

Watch the response

Record intake, stool changes, vomiting and general behaviour and contact the veterinary team for persistent or concerning signs. Marked illness, inability to keep fluids down or deterioration needs prompt advice rather than continued experimentation with foods. This guide provides no fixed percentage schedule or treatment for digestive illness. Preserve the timeline so assessment can distinguish the change itself from other exposures and underlying problems.

Common questions

Sources & further reading

References for this guide. Rules and services can change; check the responsible organisation for current details.

• Cornell: Re-evaluating your dog’s diet (opens in a new tab)

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