It's 21 weeks (nearing 22) for my two chickens I keep in my backyard. My Plymouth Rock has yet to lay (I think) but my Comet has been laying every day for one week. What's more is that I heard an egg takes a minimum of 25 hours to form inside a hen but my Comet has laid an egg within 20-21 hours! There are no problems with her eggs, they taste amazing. Could anything be wrong if she's laying too much? (or this egg could have come from my Rock, which I highly doubt)