I lost my Buff Silkie a few weeks ago. I took him in for a necropsy and the results became available to me over this weekend. He died of anemia and weakness as a result of Mite Infestation. I check for mites and I have not see them. After the lab results I went out to closely examine my birds. Look on the bum but not just the vent. Sometimes the sign is not the mite which is almost impossible to see but a sort of nest like tangle in the feathers. If you own Silkies, these mites love the head as well. Check carefully and use a magnifying glass if you can. When the infestation is bad you will see crusting on th skin. If you see any extreamly tiny dots watch them for a bit they will move slowly. Don't let your birds go with these nasty killers. I am buying Frontline with instructions for use on chickens and I will never be without it again. I have used DE and I hang strips called Die-No-Mites at the opening of each coop. Apparently that is not enough. I always thought that if you had mites you would see them on your clothes if you held you chickens against you. These little mites did not transferr to me until I started to ruffle feathers and really get up close and personal. As you can imagine I am just sick about this and I wanted to share so those of you who assume like I did that you are ok if you don't seem them, then they aren't there. Look for the tangled feathers and any excessive dry skin. Look again and again very closely. These things kill your birds.