Also, sorry you didn't get an answer to your actual question about free ranging after application. The only thing I could find says not to spray Elector PSP on or near animal's food / water. And since free range chickens obviously eat the grass... :confused:
Maybe call the manufacturer??
Also, Elector is SOOOO expensive!! I would only use it if you have an active mite/lice infestation and only on the coop and birds. Spraying your whole yard with it regularly seems like such a waste of money and product.
:oops::old
Have you tried fly catcher bags (you can find them at Home Depot (and stores like that) or online. They work really well, and you wouldn't have to worry about your birds ingesting too much because it isn't a spray. Many of them smell bad, so you would want to place them as far away from "people...