I put in a new garden today on the side of the house where my chickens have never gone. This is my first year with chickens and they are only three months old. I wasn't thinking and put down some preen when I was finished. I watered it in real well then went inside for a while. When I went back out the chickens where all over the new garden. I was horrified because I never gave it a thought that they would try to eat it. Should I be worried? I feel sick right about now!