We have 4 little SexLink girls who are almost 2. This morning all the girls were fine, everyone happy and eating when I went out to feed and clean the coop. At dinner time tonight, Doris was flat out on her side on the floor in the middle of the coop with the other 3 girls staring down at her. Brought her in to see what was wrong, no blood or broken bones anywhere but she kept closing her eyes and was having a hard time holding up her head. When I got her situated on a towel in our pet cage, I noticed she was COVERED in tiny crawling specks half the size of pepper. I immediately dusted her with DE to try to get some of them off her which wasn't helping fast enough, then took her upstairs and gave her a warm soak in diluted flea dip which did seem to take care of most of them. I thought we were winning the battle, she seemed comfortable while I was cradling her and blowdrying her. She then stretched her neck out, opened her mouth and poof--died in my arms. Ran outside and took out all the bedding and dumped a bunch of food-grade DE on the coop floor to try to get us through til morning when I can do a complete clean out. Does anyone have recommendations on what to buy? Permethrin? I can't imagine how horrible my little Doris felt with all of those mites on her and dont want any of my remaining girls to go through this. How could this have happened in just a few hours? She never showed any signs of distress before this afternoon.