Hello, This is my first time on the forum. I have a few 6 mo old backyard chickens in Seattle. I've fenced off the back half of the yard for their run, but have noticed the number of flies increasing alot over the past two weeks (the girls have been in the run about 2 months now). Any suggestions on how to keep the flies down, other than removing all the straw/shavings every few days (it would take a bale or two of straw)? Also, do I need to worry about the flies carrying any other pests or hurting the chickens? Thanks very much for the help.