I am using the deep litter method with a mix of wood shaving/chips and a little straw. It was working well until we had a recent warm up. The coop now smells of amonia in the morning - I free range during the day and it airs out during the day, but has smell again by morning. I raked the litter during the recent warm up - was that a no no? I can't rake anymore because it has gotten cold again and snowed also. The coop floor is concrete and the very bottom layer freezes when it is cold - like it is now. I do have more wood chips that I can add, but they have been outside all winter and are wet from the snow. I worry about adding wet stuff to the coop. I do have some dry straw that I could add as well, but I don't like to use too much straw. Any advice? Oh, by the way, I have 8 white leghorns and 2 banties. Thanks.