With all the heat and muggy temps. My barn has become a haven for nasty flies! We can fill 3 of the sticky fly traps in just a couple days. I've been keeping it super clean and they just keep coming! Worst lately , I have a rooster in quarantine Bc he's sick. For the past two days I've had to pick fly eggs and maggots off of him! Any safe ideas for a fly spray to put on him? Or any other ideas?