I am wondering how long before it's safe to allow chickens onto property that has been treated with herbicides (weed-out, or round-up, for example). We have not treated with any chemicals in about 4-5 years, but our neighbours have, as recently as last year. Although we don't plan to let our chickens off our property, what if there is an "oops" incident, i.e., a chicken darting out when the run door is opened? The properties in our neighbourhood are not fenced off. I wasn't sure where to post this question - sorry if it's in the wrong spot.