I agree that instincts run strong and deep in normal chickens, and they will out given half a chance. But I disagree about young humans understanding and retaining info; think about the 1st 3 years, not the teenagers or tweenagers. Infants and toddlers are soaking it up like sponges. Their native language, cultural habits etc are picked up in those years and equips them for life, and a nurturing environment, or lack thereof, is often said to have lifelong consequences too. Ditto chickens. Chickhood is much more important than people generally recognize.