I have a 2-storey critter nation cage and I'm planning on using the top floor as the brooder when my eggs hatch. I did some searching here and everyone seems to be using tubs/totes. I have a 75 watt heatlamp that I will be using and it seems to me that it will be safer to hang that in a metal cage as opposed to suspending it over a plastic tub. The cage is in a closed room that's kept at a constant temperature, no drafts. Are there any mods I should make, such as putting up walls, to make it better for the chicks? The dimensions of the space are 36" W x 24" D x 24" H, bar spacing is 1/2".