I do not know if I am posting in the right category, please let me know if not. I am looking for other peoples opinions, we recently gave my father in law two chickens as a gift ( he was a closet chicken lover) He loves his new hens and so does his wife however she told me she was recently given some advice from a friend that I personally felt very opinionated about. He told her she should never let her chickens in the vegetable garden as they will pass dangerous organisms/diseases ( I believe he means, e coli, salmonella, etc.) to her the family through the veggies. This individual works for an agricultural related industry, and I believe he is a Cal Poly graduate. So what do you think??