It's basically a live trap you set. Put food inside. Animal goes in and steps on a pad, which triggers the door to shut behind them.
You can buy one in the store...but they are expensive for that size. Like...64 dollars.
@Dread Pirate: Key, what key. I don't need a key to get into the basement.
And you look like a emo marshmallow.

@Dread Pirate: Hey. I"m a sexy as frack porcelain doll in a top hat.
And I have come for your soul. I"m hangry.

Dragon: No he looks like a Frankenberry. xD