We sometimes let our chickens free-range in our garden. However, since I was pregnant last year our garden is really more of a weed jungle! My hubby picked up some "people and pet safe" weed/grass killer that we thought we could spray over the turf areas and then mulch over it to get a jump on the weeds for this year. But I got to thinking that since the chickens scratch around it might not be the best. They're not used to free-ranging daily so I planned on keeping them in for a bit after spraying. I've posted a pic of the ingredients list. Thoughts? Advice? Other products??