Everybody's chickens get bugs and we talk about it all the time. You will find lots of posts on here to help you figure out how to get a handle on this problem.
I searched literally til 4 a.m. the night I found they had spread in spite of the Sevin and found a lot of contradiction. How do you prevent them? How do you stop them once infested? I bought DE and then read not to use it with deep liter method because it will kill off beneficial organisms... I am a newbie. Please what works for you?