Hi I am raising my first flock of chickens and need some answers to some basic questions. 1.) I was wondering how often should I change the shaving in the coop?? I am currently using pine shavings. 2.) How often do I need to deep clean the coop with bleach or other cleaning agents? 3.) I have heard a lot about DE. What is that and how often should I use it. Any other information in regards to coop cleaning would be very helpful. Thanks Here is a picture of my coop if it will be helpful.