You may have already heard the litany of chicken horrors: the hormones and antibiotics, the hellscapes of cramped cages, the way fillets are pumped full of salt water to make them seem juicier than they are.
Add to that list arsenic-laced chicken feed, which was a product sold by Pfizer that makes chicken grow faster and pinker. The same feed is illegal in most of Europe, but Pfizer didn't stop selling it until 2011. Even now, poultry producers aren't breaking the law if they use leftover stockpiles of the feed (except in Maryland).
Arsenic is also another cancer-causing agent. Even if the amount in chicken isn't terribly harmful, polluted chicken waste can still poison our waters and lands.