Question about grass and "field trips"

[ufgrad98]

We use a lawn service similar to TruGreen to fertilize and spray our yard. Does this mean that the chickens can never go on our grass?? If they can go on the grass, how long do I need to wait from the time that the lawn service put down chemicals until they can go on the grass?
Thanks!

 

[andrew6d9]

wait about 2 rains after it is sprayed on.

 

[BellevueOmlet]

I would not let my chickens on it after that for a long time but I am an organic and health nut so 2 rains is probably fine. Can you get by without those services for your chickens sake?