I am looking at postings on Craigslist from people who want to sell their chickens. Everyone seems to be selling hens that have "just started laying" or that are "less than a year old". And it made me wonder - is there a way to tell if the chickens are really that age? Could they be trying to pass off a two or three year old chicken (one that's laying much less than before) as a younger one? If they could be trying to do that, is there a way a beginner can avoid getting suckered? I appreciate any guidance! Thanks!