Hello, My hens are 7 weeks old I have 4 in a coop that can hold 6 to 8. I also have a run. I use pine shavings. I was wondering how often do I need to change the pine and how much pine shavings? My coop has a drwar that you pull out but does not allow you to use much shavings if you want the tray to slide out ?. How often do I need to change the shavings in the nesting boxes? Do I need to rake the Ground in the coop and Run and take the old out and put new dirt and leaves back in? I use vinigar and soap to clean the feeders is thAt ok? I put the chickens in the run and cleaned coop wood with vinegar once a week is that to much? Thank you!!