I wasn't to sure which category to post this question under, but I figured this one would be a good choice. How do you tell the age of your chickens? And what are there average lifespan? Here are a couple of pics of my four hens any input is appreciated! Thanks! Also wondering if anyone can predict the age of mine. "Bit ch" on the left, "Rogaine" on the right "Mrs. T" "Tyson"