I believe 2 of my 4 hens have scaly leg mites and just began treating them with a spray I picked up at Fleet Farm. I treated all the birds. The 2 that seem to have lifting scales, were year old free range birds when I acquired them, the other two we got as chicks. I am a new urban chicken farmer so am unsure as to how to treat my coop? We live in the cold far north so cleaning my 8X10 coop isnt easy because I cant exactly "clean" it by disinfecting it. My coop floor is bricked and I have about 6" of straw on the floor and I have some straw bales covering the drafty areas of the coop and they line the perimeter of the coop for insulating. Should I remove the straw? If so, how do I keep an otherwise uninsulated building warm enough for the chickens? I have 2 heat lamps that currently keep the temp 20-30 degrees. The chickens are all laying daily so dont seem to be stressed. As I treat their legs, I just want to be sure they arent reinfected.