I am here to give people the CORRECT advice. DE does not work and has been known to give chickens breathing problems. But, I will let the OP decide what they want to treat with@cherrynberry
@tripletfeb
It actually does... I recently used it to treat mites and lice. After a few treatments ALL are dead. I do not use permethrin because it has the potential to harm chickens. Its says to avoid with the face and eyes of the birds (kinda hard since they clean themselves) and is toxic to humans, bees, and cats. I'm not arguing but everyone has a different way of treating their birds.
We are here to give people advice, they can still do research on their own to use a product they're comfortable with.