I've enjoyed this site for some time now. I am making a cover for my well and lining it with 2" poly foam board. You know the kind you get in packages that sends those x Static charges balls all over the room. Well I guess my chickens decided to help with the project but startes to eat those little foam balls. I haven't seen any problems yet but I am being cautious. I wanted to pass this along to othes that may find themselves in a similar situation.