ok. i have 3 roosters that are my excess roos and they are in a pen attached to the outside of my coop about 4 feet off the ground on wire. well anyway i was gonna let them out for 1 hour yesterday and then shut them up again and i was wondering if they still had mites( i treated them before i put them in the cage)(about 2 months ago). well i looked around the vent and you can see the parent mites and the baby mites all over there vents. so i put them back in the cage and looked to see if my other chickens have them and low and behold they DO!!!!!!!! well how did the mites get on my roos in the cage OFF THE GROUND, ON WIRE!!!!!!! how do i treat them. when do i treat them. how often. whats the ABSOLUTE BEST THING TO GET!!?? like i said i treated them before but the mites just keep comming back. its a dust for mite prevention called something like invectrim or something. im not sure(ill have to go check) but yeah i treated them before and they keep on comming back. can i treat them over the winter that way i kill them and there arent any living outside they bring in. where are they getting them from?? my best guess is outside when they free range?? how often do i treat them?? WHAT IS THE ABSOLUTE BEST THING TO USE!!!!!!??? PLEASE I THINK MY CHICKENS ARE SUFFERING BUT I DONT KNOW WHAT TO DO.!!! PLEASE PLEASE PLEASE PLEASE PLEASE HELP ME!!!!!!!!!!!!!!!