Cage (Wasteland Workshop)

Cages are constructible items that were added to Fallout 4 by the Wasteland Workshop add-on.

Gameplay
Upon being built, the cage must be supplied with power (does not count against the settlement supply, similar to indoor lighting), then left alone for some time. Sleeping in a bed or leaving the settlement will eventually result in the cage's door closing and occasional noises coming from inside. Shutting off the power or hitting the cage door with a melee attack will then open the cage and release the game trapped within. Cages are divided into three sub-categories:
 * Small cage: Cat, dog, mole rat, mutant hound
 * Medium cage: Feral ghoul, gorilla, Gunner, Insect (bloatfly, bloodbug, radroach or stingwing), raider, Super Mutant
 * Large cage: Brahmin, deathclaw, mirelurk, radscorpion, radstag, yao guai

Bugs

 * Occasionally cages will stop functioning properly and fail to trap anything, typically after a settlement attack or a long in-game period has gone without checking it.
 * The only known fix is to remove the cage and replace it, while also hooking it up to an entirely new power source.
 * Captured mirelurk hunters or kings have a tendency to disappear from settlements after some time and are replaced by the more common, crab variants of mirelurks.