your ferrets may start 'schratchin' in that box because of the big hole's, the best way (i am told) is to make a 4 or 5 small hole'ss instead of 2 or 3 big hole's so they dont scratch.
all the best
I disagree with that My ferret box with small holes they scratch like shit, and the one with one bigger meshed up hole they never scratch as they can see out