This may be the dumbest question ever asked but is it obvious when your birds have mites? I am going to sell some feathered foot chickens soon and looked them over. It seems alot of people have mite problems. I don't see any and I admit to not having the most perfect litter changing regiment. Although many say my barn is the cleanest one they have ever bought eggs from. I do what I can. Is it possible that I just don't have mites?