I am at war with the flies. My biggest problem is I am located next to a cow/calf operation, so there is an endless food supply and opportunity for hatch of the flies. The deer get the short end of the stick. I have been tending to the problem vigorously for a few weeks now, with mediocre improvement. Permethrin, fly traps, garlic and Aureomycin are all in play. The cows are not going to leave, so I feel like rather than trying to keep the flies away from the deer, I just need to kill the flies. Sooner or later, I will win. I am thinking about fogging. I know very little about the practice, so I am looking for advice. By all means, please chime in if another process will yield similar results. Thank you in advance for your help.