Hello from the high desert! I have a greenhouse/converted to chicken house where my 16 chickens, 12 guinea, and 2 adult pea fowl live. I bet there were 5000 flies out there just now when I went to make sure the chicks were warm enough. I know they are going inside because it is fall and all that. But I am wondering if there is something I can spray on the floor (droppings/straw/woodchips) when all the birds are out in the daytime that will kill the suckers?????