I have a cockerel that keeps getting mites. I have dusted him several times and I have treated him with pour on Ivermectin and Ivomec Eprinex. He keeps getting them. The other birds all sleep in the same coop with him and they don't have any (at least that I can see) but I treat them too just to be sure. I have powdered the coop floor also. I have no idea why he is the only one getting them. I am loosing my mind Has anyone else ever had this problem? What can I do nothing seems to work. They just keep coming back but only on him.