I have a couple of hens that are just starting to lay. They were laying in the boxes to start but are now laying in the dirt in the run or exercise area. What can I do to stop this? Why are they doing it? These eggs are filthy. Can I clean them off? I know your not suppose to but they are so gross and dirty and sometimes muddy. I wouldn't want to keep them if I can not clean them some how without causing problems with the egg. Any suggestions on these topics?