So I have heard that with fleece it is best to have a absorbent layer like a vet bed or uhaul blanket. And I was wondering if like you can just cut uhaul blankets to fit the pan just like how you cut fleece? Other wise would I just fold it to fit in th cage? I am mainly concerned about the upper level in the Dcn sine it has the opening to the bottom. Is there anything inside the blanket that would be bad for rats to have access to ad would I need to sew the parts I cut closed or something? Also it would be great if you could list where you got your uhaul blanket or vet bed. Thank you so much!