re: How do you get rid of a rat in the attic?

TREX trap. Make sure it’s up against something. Put peanut butter in the trap but also bait the box with poison. The poison and the peanut butter will attract him and he won’t be able to get to the poison. You don’t want him dying in your wall. You want the TREX trap to get him.

Get multiple boxes. If you have one, you have several.