Hello. I can't seem to find information on this topic anywhere. The coops on the farm I'm working at are mobile coops raised ~2 feet off the ground, and the floors are metal grates (diamond shaped holes, approx. 1" long and 0.5" wide). I think they were using the deep litter method, but the feces/leaves were very compact and appeared moist, so I think it's better to get rid of the crap and try normal litter instead. Much of the grate is currently exposed. What type of litter, if any, is supposed to be used with this type of flooring? Is it safe for chickens to walk on? If not, can some type of flooring be easily and cheaply installed atop the grate floor? Can predators enter through the holes? Another question--the coops are shaped like a cylinder that's been cut long ways, constructed from a few curved metal poles with thin white plastic covers over them. The plastic is torn in some places, leaving the coops a bit exposed to the outside. There's silver insulation that looks like it has bubble wrap between the 2 silver layers (idk the proper name for it) lining the ceiling and half of the walls. There's also chicken wire on the back, flat face of each of the coops (and some of it is not covered by the plastic sheet)--no hardware cloth anywhere. Is this...an appropriate and safe coop design? The original designer/owner was apparently a farming expert, so I don't know what to think. I want the chickens to be safe and happy for their short lives. Thank you in advance.