I just introduced 4 chicks to the coop. They are 8 weeks and growing FAST. Yesterday I found a tiny tiny yolkless egg. 1/3 of the size of a golf ball. Is it possible that it came from one of the pullets or is it just a freak thing that one of the hens laid? I have Red Stars and White Leghorns and usually their eggs are large to extra large. I've read that pullets won't start to lay until at least 20 weeks but maybe this was just a practice one? It seems WAY too early!