My hens just recently started laying about 5-6 weeks ago. I bought a couple ISA Browns at about that time, which were allegedly just starting to lay. My ISA Brown eggs are nice and big. In fact, they're quite large. They lay great. My Araucana eggs are quite a bit smaller, but I've heard that this is typical for that breed. However, my RIR and Wyandotte eggs are smaller than my Araucana's. In fact, my Wyandotte's eggs are sometimes so small that my daughter thinks they're "cute". Did I do something wrong? Are they not getting enough calcium (oyster shell)? I added a large supply of oyster shell recently, but their shells didn't seem soft before, just small. Or did I just get two chickens that lay unusually small eggs? Any thoughts would be appreciated. By the way, my ISA's have integrated with the flock pretty well at this point.