I don't think fermented feed that has 'fermented' to alcohol would hurt the chickens. IDK? though, don't quote me on that but I would think it would still be OK, not rotton or went bad or anything, just not the ferment your looking for.
When I first started fermenting it was winter, and it gets subzero here. Had fewer chickens so got away with smaller containers. Was using the big plastic coffee containers, had four of them and #rd them, rotated them. Had them in the doorway to our cellar, didn't smell. Had to be careful not to put too much in so it didn't work out of them. When I switched to one five gallon bucket and using the backslop I still fermented it in the top of the stairs to the cellar in winter, no noticeable smell. We don't use our cellar for anything but water pressure tank, furnace, storage etc so no big deal. Kept it outside in warmer months.
I don't bother with fermenting in winter anymore, just too much hassle IMHO, freezes into a hard chunk if they don't eat it all, and I only can feed them once a day.
When I first started fermenting it was winter, and it gets subzero here. Had fewer chickens so got away with smaller containers. Was using the big plastic coffee containers, had four of them and #rd them, rotated them. Had them in the doorway to our cellar, didn't smell. Had to be careful not to put too much in so it didn't work out of them. When I switched to one five gallon bucket and using the backslop I still fermented it in the top of the stairs to the cellar in winter, no noticeable smell. We don't use our cellar for anything but water pressure tank, furnace, storage etc so no big deal. Kept it outside in warmer months.
I don't bother with fermenting in winter anymore, just too much hassle IMHO, freezes into a hard chunk if they don't eat it all, and I only can feed them once a day.