I have been learning from your posts but I have a problem due to the number of birds in our coop. There are probably 100 - 110 chickens of several varieties, turkeys, 10 Guineas and cornish and I find that it takes 3 days for fresh hay to be completely covered with a wet layer of droppings. The coop is about 12x12. If I don't turn the straw, ammonia starts to show up. My problem is my sniffer doesn't pick up the ammonia right away. It has to be a bit stronger for me ti smell it. How deep should the straw be would you say with this many birds?