Hi! I'm new to the whole raising chickens community and I started with 4 various 1 week old chicks which are now 5 months old! Everything was going to fine and I thought "yeah. I got this!" until..... This I have an Orpington, a Bard Rock, an Amercauna and a Cochin. The buff has been laying for 2 weeks consistently and hard shells. The Bard Rock dropped 2 eggs in one day a couple of times so I added oyster shell to their food. 2 days ago and today there were 2 virtually shell-less eggs laid but I'm not sure who (not the the Orpington) laid them. Is there anything else I can do? Is this a young layer thing going on?????