Mosquito Steve's fly control safely treats any surfaces flies land on, including animals themselves, using plant essential oils instead of synthetic pesticide. That distinction matters more with flies than with any other pest, because flies gather exactly where you least want chemistry: around food, feed, water troughs and animals.  Our plant-based oil repellent requires no waiting period, no hazardous bi-products, no keeping animals off, no worrying about animal feed and no worrying about family.