I discovered that one of my chickens has a pretty bad infestation of what I think are lice or mites. They are yellowish little bugs. He has lost some of his feathers and his skin is bright red. What do I put on him and the rest of the chickens. A problem that I have is that most of my chickens are free range. They roost in a very tall tree at night (despite the fact that I have two very nice houses for them) so catching them at night is impossible. Is there something that I can feed them that will kill these horrible bugs? Can I put something in the dirt where they take dust baths? If I get guinees (sp) will they eat the things? I need some help! They make me itch just knowing they're there!