OK, here is the situation...have discovered mites on my birds, unfortunately i have some that have already been compromised and have lost 2 in 2 days, the first i believe just got too weak, the 2nd developed pneumonia and i had to put her down. I have dusted each one and seperated the flock so the ones who appear the most compromised are seperate.....i have one that is making an odd noise, am worried she may be getting pneumonia too, should i seperate her from the rest and what do i treat her with?? It has been too cold and rainy here to tear apart my coop for a through cleaning, but hope to do so tommorrow, am going to use sevin dust after cleaning and use new shavings with DE, also going to paint all the nest boxes and roosts, and other suggestions would be greatly appreciated. I have put the birds i feel are having problems, back on medicated chick starter, as their appetite seems poor and they like that better then the layer feed, have put vitamins and vinegar in their water and they are in a clean cage with new shavings, they were also dusted.