Plan activities inside the cage separately from supervised exploration outside it.
Choose a usable route
Woodgreen's rat guide lists pipes, tunnels, cardboard boxes, hammocks and ropes among enrichment options.
For climbing ropes, the RSPCA behaviour guide specifies natural fibres such as cotton, with replacement when needed.
Match each accessory to its fitting instructions and the usable route. A hammock across the only passage is an access problem, not another activity. Check the separate rat-cage layout before adding more equipment.
Prepare outside exploration
RSPCA reserves supervised free-ranging for well-handled, relaxed rats, in an area where they cannot hurt themselves or escape.
Its new-owner leaflet adds rat-proofing: cover electrical cables and remove hazardous plants. Keep hiding places available.
Prepare the actual space before opening access. This is not an instruction to release newly arrived or frightened rats, or a substitute for supervision.
Offer searching and choice
Woodgreen suggests scattering the normal daily food allowance around the cage for foraging. Change how an appropriate ration is offered rather than automatically adding another meal.
Let rats investigate at their own pace, without force. Match interactions to their active periods and leave them to rest undisturbed.
Watch for exploration or withdrawal. Let each rat leave; participation does not require every animal to use every item.
Inspect and adjust
RSPCA recommends rotating toys regularly, without specifying one universal timetable.
Before reuse, inspect the optional equipment and resolve damage or unclear fittings. Preserve access to resources and retreats when changing it. A new arrangement does not prove improved welfare.
Changes in behaviour or recurring stress or fear call for veterinary advice. Stop extending the activity to try to overcome those signs.
