Chickens actually get weak from laying eggs and will eat their own eggs to re-energize themselves. Chickens are much smarter than people think and have very strong familial ties. When a speaker was giving a speech at Harvard University he described the traits of an animal without telling them what animal it was. Almost all the students guessed he was describing a monkey…but he was describing a chicken (^_^)
The following is footage taken from The Woodstock Farm Animal Sanctuary in Woodstock, New York (view their website).