screened

This is the first day's worth of poop and stuff that fell through the screen. Super easy cleanup!

This permits the maximum airflow path.

Doesn't need to be screened, but if you do, screen the outside to prevent any clearance issues.

I ended up making two large holes instead of the four because of this kind of plastic's tendency to crack when being cut or drilled.

Sterilite 90qt tubs from Wal Mart. Get some with better lids, if you do this!