I am in the process of putting an addition onto my chicken coop. I will be building it in part of the existing run. The run stinks where the girls have spilled their food and it has gotten wet. They also hang around the food dish area a lot, so I'm sure some of the smell is poop. What can I put on the stink pile to help neutralize the smell without harming the chickens. The coop addition will be built over the stink pile and will have a floor in it. We are also hoping to keep the rodent population under the coop to a minimum. Ideas would be appreciated!!!!