Hello! New gardener and chicken owner here. This is our first winter with our hens. It has snowed significantly but the birds are doing fine; we shovel them a path to encourage them to get out into the yard after a snowfall. My husband attempted a cold frame over our existing garden box that wasn't able to get enough sun/retain enough heat to keep plants alive this winter. But the birds really love it, since it is covered so it stays dry in there, so he just opens it for them during the day and they basically hang in there all day. But....what effect will all their poop have on the soil in there come spring? I pointed out that he is also basically training them to destroy the garden...but we do put fencing around it when we plant. Anyway, will it just be good for the soil, or will it be too much/not enough time processed? Thanks for your thoughts!