Call me Writer62. I'm a total city slicker from the Big Apple, doing some research for an article I'm writing. I'm totally clueless about chickens! Not that I'm anti-chicken, but I never expect to raise any myself. Actually, chickens aren't even my main topic, but I'm trying to verify something I read that was written over a century ago, before I quote it as fact. The claim was made that when hens brood they make a tremulous motion to stimulate the eggs/chicks. They are also said to have a small area of bare skin in contact with the little guys. It is further asserted that this is true of other species, such as eagles and doves. Anyone know if these things are true? What is the purpose of these things? Are these universal facts? Are there any source documents I can site, since I obviously don't know what I'm talking about? Any input would be greatly appreciated, and is bound to be any improvement over the chili ad's conclusion: "New York City? Get a rope!" Thanks again.