I have been using the deep litter method , I use stall dry and
some lime tossed onto the wood shavings with the addition of fresh shavings
when its need I have no odor and I only totaly clean out my coops in Sept. and April.
adding the extra shavings and Stall dry, when needed
I feel is the key to keep the odor down..and of course the lime
but I also have a 1 inch vent all around the roof line.
and the pop door is opened all day for then to
get to their run. And I rid my self of dropping boards and substituted
my empty feed bags flatned out,
as they get soiled I just sliped out , and add the clean feed bag.
( shake into the compost and toss the bag.)
its really a time saver. for me.