My favorite little hen "Sweetie" a Sagita I think, has had a messy vent for several weeks. I finally gathered up my courage to look and she has a nasty infestation of crawly bugs and eggs around her vent with the eggs glued to the base of the feathers. One other hen seems to be starting up with the same. I have cleaned out the coop and doused thoroughly with DE. Anything else I should be doing?