I have six pullets (11 weeks and 12 weeks) in a 34 square foot coop built into a corner of an outdoor carriage house/garage, opening onto an outdoor run. I'm trying out deep litter to avoid mucking out all winter, and it seems to work ok so far. I'm mixing in some small amounts of stall dry as needed with about 6 inches of straw and stirring around the whole thing about 2X a month. I haven't had to add straw yet, it smells ok to me. I'm wondering if stall dry is ok for the chickens to be exposed to both mixed in the straw and just sprinkled around the ledges where a lot of poo collects. Second part of the question - is stall dry considered safe to use in the garden after all this is composted?