I was cleaning the coop today and noticed that underneath the hay for the nesting boxes were little tiny bugs...a lot of them. Yuck! I took the dirty hay out and replaced it with pine shavings instead. What the heck are these little bugs and are them harmful to the chickens? My pullets are now about 10 weeks old. Also, I don't have anything on the floor. Should I put shavings on the floor? if so, how often do I have to replace it? We have been getting rain pretty much every day so I'm trying to think of ways to keep the coop from getting too dank.