Okay we have four girls and they free range in our backyard all day. I clean the porch daily and try to rake what i can. I clean the coop regularly (every week) and the yard stinks like bird poo. What can i do to keep the smell down? We are in suburbia and have neighbors whose yard and house are only feet away. I don't want to pen the girls in the coop and run all the time. They love running around. Any advice?