Fellow Cube coop owner here - Curious about other summer accommodations? We're experiencing a heat wave right now, and I worry about the ventilation and heat getting trapped. I'm considering taking the back off of the coop during the super hot days to get the air moving, and I'm curious if you have other suggestions!
Because we are expecting record heat this summer I have been thinking of ways to safely increase the ventilation since observing one chicken wing-spreading and panting shortly after the door closes. I think it gets better later in the night as the evening cools off, but still. Heat is tough on Buckeyes. Some wing-spread even in the shade outside the coop on hot days (besides other nutballs sunbathing then - go figure!).
I would not remove the back door. That leaves them so exposed. Think about predation from above, too - what about owls? I have their run areas aviary netted but the Cube itself is not. I do have the whole coop and run areas surrounded by electric fencing - poultry netting, small enough to hopefully thwart a weasel.
I do not want to remove the poop tray because the back part of the tray, with it's dual push-up catch, is a reasonably good protection against anything reaching in and up through the roost bars. The welded wire below the Cube, covered with hardware cloth, also is good protection.
I saw a post on the Omlet user Facebook site by someone who made a screened tray out of wood that fits in there. It's like a cabinet drawer and is really nice looking, but without any safety catches. I think they bungee'd it on against a predator pulling it out by the cabinet knob, not enough imo.
My solution was to buy another poop tray ($35 plus shipping), and to modify it along those lines. I'll see if I can get some pics if anyone is interested. Here's what I did -
I cut out a rectangular hole in the middle, and drilled small holes around it, mostly within the long flex indents. Then I cut and laid 1/2" hardware cloth on the upper side, and secured that with a million good zip ties through the holes. I fastened them with the head up, so that the bottom of the poop tray could slide easily back and forth.
I then cut a bigger piece of nylon porch screening and just lay it on top of that, because we have a lot of mosquitoes here. It will easily lift off for cleaning, and keep the poop off the galvanized hardware cloth (I would use vinyl-coated HC next time). I did pile hemp bedding around the solid edges to catch and easily lift off any poop that lands there.
So far it's working well. What I would change (besides using vinyl-coated HC insteada of bare galvanized), is one or two zip ties catch a bit upon pulling it out. I lift it slightly and it's fine, not a big deal. But I think there are a couple of zip ties on the far end that aren't laying quite flat because of how the holes and the HC openings lined up. They might be a little twisted. I will probably fix that.