How do I get rid of a critter in my attic?
We have a Mama rat! How do we get rid of her?


The usual procedure is 


Find out where it got in and block the entrance. Wire mesh (wire cloth) works if you get a size suited to the size of animal. Small mice can squeeze through tiny gaps.
Put down several baited traps.


Check daily and keep resetting and rebaiting until all the visitors have been removed



There are several types of trap and of course you can always hire someone experienced or a reputable firm to do the work for you.

Rats are quite smart so you may have to try several types of trap and keep moving them around. Placement is important, you typically put them against the edges of spaces.