Which method should not be used if you want to prevent rats from dying inside walls?

Using a bait box is not recommended if the goal is to prevent rats from dying inside walls. Bait boxes typically contain poison, and when rats consume this poison, they often leave their hiding places and seek water or a safe space to die, which could be inside walls, attics, or other enclosed spaces. This can lead to difficult-to-manage situations, such as unpleasant odors and potential health risks from decomposing rodents in inaccessible areas.

On the other hand, traps—whether snap traps or live traps—are designed to capture rats without the risk of them dying in hidden places. Snap traps kill rats instantly, while live traps catch them alive, allowing for safe relocation. Both methods ensure that the animal does not suffer from the consequences of poison and allows for proper disposal, thereby preventing the issues associated with dead rats inside walls.