Fiberglass? I don't know bout you but that sounds mighty uncomfortable to me. You ever had a fiber glass sliver or itch like crazy cause that stuff got on you.
Fiberglass just sounds bad!
Have you ever found wild mice in a garage or house? They are almost always nested in fiberglass insulation. Trust me, it's their nest of choice. Insulation is not like it was 20 years ago. It only takes a handful.