My first time raising chickens, I have 18 healthy beautiful birds. Do I have to "dust" or treat them on a regular basis? They all seem happy, the pullets are now laying eggs and my two roos are healthy and happy as well. I have picked up a couple of the Buffs to inspect and have seen no evidence of any type of infestation, but I have read in books that I should be periodically treating for lice and mites. What products are the best, Sevin dust? Also, do I need to dust the coop? I do a complete scrape and clean every 10 days or so, with fresh shavings and pine pellets as bedding. I am a little confused if this is a necessary preventive, or something to do only if infestation is seen. All have beautiful, lovely clean feathers, and no signs of any problems, but they do free range on a partially wooded property, so can they get infested that way? I have been watching for signs of tick problems and haven't seen any yet. I do appreciate any advice from people with some years experience, especially in the Northern Illinois region.