I set a rat trap once and caught a rat in about 10 minutes. I walked around the other side of the shed, opened the door and pulled the trap out (all I could see was the rat's head in the trap because it had dragged it back in the hole).
In 10 minute's time, his buds had reduced him to a head with a skin hanging off of it.
Dog eat dog ain't got sh!t on the rat world.