Jordon, my daughter and 2 grands came home for a couple months and swore they heard a squirrel or other varmint in the attic. I never heard it myself while they were back. The other day, I was in that room and a closet when I heard a light squeaking and scratching, like my daughter had described....I quietly entered the attic, bat and net in hand....the "varmint" wound up being a lightly turning wind turbine on the roof that is only heard when it is VERY quiet and a light breeze is going...