I’ve resurrected this old thread to report a small victory in my war with the Tree Rats.
Soon after we had the roof re-decked and new shingles put on, a nesting pair decided that there was a nice warm nesting place inside the an enclosed hip roof. I heard them chewing trying to get through the decking and shooed them away several times. Despite my effort they opened up a hole and started building their nest in a blind attic over my dining room. I dumped moth balls into the hole and we tried to drive them away by banging on the ceiling during their rest hours. But they were more persistent than we, and refused to move.
A call to several pest removal experts was made and we got the news that this can be a pesky and expensive problem. You can’t poison them because they will die in the nest and stink up the house for months. Simply blocking the hole will not work because even if you use metal, they will find a new spot and chew in again. The only solution is trapping, live or dead. I was ready to buy kill traps but my family protested, so off to Lowes to buy a Have-a-Heart trap.
Lowes carries two sizes - small for squirrels and chipmunks and large for skunks, raccoons and cats. The small one looked too small, but it was $30 cheaper so I bought it. I placed it in their path open without bait as instructed, so they would get used to it. After the third day I baited it with peanut butter (must be chunky I’m told). Within hours I heard the trap spring and went out to check. I was right, my resident tree rat was huge. When he sprung the trap his body kept the doors from latching and he was able to escape.
Back to Lowes on Saturday to return the small and buy the large. It is HUGE by comparison. I assembled it and set it on the back porch, planning to put it in thier path in the morning. Matt suggested I bait it anyway, and since there was nothing to loose, I did. Sunday morning “Rocky J” was in the trap pacing. We covered the trap with an old towel and loaded it in the car. We’re told you must take them at least 10 air miles away or they will find their way back. We took Rocky to the Lowes parking lot - they have lots of trees at the perimeter 
Sunday afternoon I baited again and by Monday afternoon Mrs. Rocky J. was in the trap. Marilyn drove her to Lowes to join Mr. Rocky J. I baited again this morning and just got a call that we’ve bagged #3.
I hope we have enough peanut butter ! There are a lot of squirrels in this neighborhood.