I use the deep liter method in my coop. I currently have 5 hens and 16 - 11 week pullets. There is approximatly 5-7 inches of pine shavings in my coop. I stir them daily but I have the ammonia odor not real strong right now but getting there. What can I do to fix this situation? Do I need to clean the coop and replace with new bedding. I just got these chicks the last of Sept. so they have not been in the coop long.