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PestDeck practical guide

Pest droppings identification

How to use size, shape, location and freshness without relying on droppings alone.

Brown rat (Rattus norvegicus)
Practical UK guidanceEvidence before action
01UnderstandStart with the evidence02CompareRule out weak assumptions03PreventUse low-risk practical steps04EscalateKnow when professional help fits
Answer first

Droppings can be useful evidence, but identification should combine their size, shape, freshness and location with tracks, gnawing, harbourage or sightings.

What to check

  • Compare rat and mouse evidence
  • Check freshness before assuming activity is current
  • Use gloves and sensible hygiene around contaminated material

Use evidence, not guesses

Record what you have seen, where it appears and whether the evidence is fresh. Compare the relevant PestDeck pest profiles before choosing treatment.

When to get help

Professional identification is sensible when the evidence is unclear, activity is established or recurring, access is difficult, a business or shared building is affected, or wildlife and safety rules may apply.

Reviewed: 2026-09-05 Β· UK-focused guidance. Follow product labels and current wildlife law; PestDeck does not provide hazardous pesticide misuse instructions.
Next step

Turn the guide into a decision

Not sure what pest you have? Start with photographs and evidence. Know the problem already? Search the relevant service in your area.

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