Recently I posted a question about my chickens having red balled places on their butts and a bit on their backs too. I have 33 chickens and have never had a bug problem. This may seem odd, but I don't even know what to put on them to get rid of the bugs. Everyone has different ideas about pesticides and what-not. I just want something that will do the job....safely. Anyone got a good remedy? Only the pen with my youngest layers have this problem. Would it be safe to just treat them and not the rest? Thanks a bunch for any tips.