Great set up! What is the black square thing with the yellow legs?Last year's brooder: The 2x4s kept the cats from sagging through the top This year's brooder: I think it's a 55 gallon or somewhere about there. Got it at Wal_mart for $17. My cardboard box brooder held 10 chicks until they were 5-6 weeks old. I expect similar results with this brooder. The only thing I miss is that I could use the heat from the heat lamp and that grate over the top of the box to sprout seeds for the garden Don't miss the power bill though, it's good to go to 22 watts instead of 250 watts.