I discovered that I had a chicken mite infestation (also known as red mite or roost mite.) As with any problem I have these days, I started obsessively searching the internet. I came across information on an insecticide that I haven't heard much about before that has an active ingredient called spinosad. I wasn't necessarily looking for something organic. I just wanted a treatment that was effective but did not pose much risk to my chickens. Actually my first spray down of the coop after cleaning it was with a pyrethrine and piperonyl based flea and tick spray called Sergeant's Silver for cats and dogs. It has the same class of active ingredient that many poultry sprays have. So with any treatment of red mite you must respray the coop 7 days later. I started searching online for another treatment because I wanted to guard against potentially resistant mites. I could have used Sevin ( active ingredient carbaryl), but when I read about spinosad, I thought I would give it a try. I used Captain Jack's for the second spray. After doing a search here on BYC, I was surprised to find only a hand full threads that mentioned spinosad, and usually the reference was buried deep in the thread. This is an active ingredient that is written up in Mother Earth News and has FDA approval in a veterinary and a human treatment. How can we not know more bout this on BYC? So I thought I would start a thread to share what I learned from my seemingly endless Googling of spinosad: - It is the active ingredient in a topical treatment for lice on humans that is FDA approved. - It is the active ingredient in Comfortis, an FDA approved oral treatment of fleas for cats and dogs. - It is in agricultural livestock spray approved for use with poultry called Elector PSP, and they even have directions for spraying directly on birds for Northern Fowl Mite. - There is a published scientific study that shows its effectiveness in treating chicken mite infestation. Finally, there is an organic alternative to DE for those who want something natural that I can suggest to treat external pests on poultry! DE is fine for prevention, but once there is an infestation, it is not effective. I am especially glad that spinosad has been used directly on chickens for Northern Fowl Mite considering that infestation can kill chickens. If you have used a product with spinosad, please mention what product you used and how it worked for you.