Very interesting, informative and unique article. I've always marveled while watching broody hens interact with their chicks. Broodies become very excited to sacrifice tasty food morsels, calling to their chicks with a sense of urgency, "Look what momma found!" When not broody, these same hens share with no one. Mesotocin production explains the reason for a broody hen's extreme change from normal hen behavior. It seems natural to make the connection that humans bond with birds the same as we do with dogs and other mammals. Friendly but non-broody hens produce mesotocin when closely interacting with their humans, and that we humans at the same time produce oxytocin, thereby cementing emotional bonds.