We have a lawn service who comes out once ever 2 months or so. I was too late in calling to cancel this service in the backyard when we got our chicks. They came out and put down fertilizer and pre-emergent weed control last week. Now I'm sad because my chicks can't go out on the grass! My question is, how long do I need to wait before it's safe? A good rain? Wash the area with a water hose? A season (hopefully not!)? I have a call into the company to find out exactly what they use, AND to tell them to cancel it. All it said on the flyer they left was to keep pets and people off of it for 2 hours. Anyone have any advice for this situation? Thanks a lot in advance!