Another source of poisoning is exposure to the organic solvent dichloromethane, found in some paint strippers, as the metabolism of dichloromethane produces carbon monoxide.
Multiple studies have found that housing hens in particularly close quarters, known as battery cages, may increase the likelihood of salmonella poisoning.
Having a cascarn broken over one's head is said to bring good luck, however concerns over salmonella poisoning eroded support for the practice beginning in 2003.