The stored material can reveal the first task
Birdseed, pet food, and similar supplies deserve secure, durable containers. Clean accessible spills and identify which packages were damaged. Do not move suspect cartons into occupied rooms just to clear the shed. A storage discovery may be old, so give the last known intact date if possible and keep it separate from current sightings or fresh damage.
Confirm whether the concern is mice or rats
A mouse and an adult rat differ greatly in size, but a young rat can be mistaken for a mouse. Rodent identification should guide control equipment and the areas assessed. A rat concern can add ground-level shelter and burrows to the review; mice also exploit small building openings and protected indoor spaces. Do not assume every hole beside a shed is an active rat burrow without an assessment.
Treat the shed as its own building
Give the door, wall, and service-entry conditions that are visible from a safe position. Explain whether any signs occur in the house or another outbuilding too. A detached shed is not automatically included in a household treatment price. Ask which structures will be inspected, how the current activity will be managed, and whether exclusion or carpentry is part of the proposal.
Plan for what happens after the supplies are moved
Storage improvements reduce food access, but they do not close a door gap or establish that rodents are gone. Ask who handles repairs, how equipment will be monitored, and what continuing evidence should prompt review. Mention pets and children who can reach the building. Call about Greenfield rodent-control options with the shed, stored food, and any house findings clearly separated so each part of the property gets an appropriate scope.
Further reading: Local or pest background · University of Georgia: rats and mice in house and yard · CDC: cleaning up after rodents