My chickens have been showing various symptoms of not feeling well - several were slightly lethargic, some had floppy combs, and egg production dropped. I couldn't for the life of me figure out WHY. But, this morning, I did a check for mites/lice....and yup, that was it. The two I checked had nits on their feathers, and I saw several little buggers scurry away. I'm not sure what kind they were - they were an orange-yellow color and looks slightly transluscent, and were "big" for mites/lice; I'm thinking it's lice. How do I treat this? I have several canisters of Permethrin. Would that work? Do I need to treat the whole coop, or just the chickens?