Found this and just thought I would post it for everyone to be aware of it.
http://www.grist.org/article/food-arsenic-found-in-utah-kids-urine-traced-to-their-pet-chickens-fe/
http://www.grist.org/article/food-arsenic-found-in-utah-kids-urine-traced-to-their-pet-chickens-fe/