It's all about the evolution of the beings before the chicken, or the chicken egg. Lets call it a Proto-Chicken, which laided proto-chicken eggs.. and before the proto-chicken came the dinosaur-looking-proto-proto-chicken.... which could lay eggs, dinosaur-looking-proto-proto-chicken eggs... before him came the dinosaur, perhaps the Coelophysis? that would be cool.. and that layed Coelophysis eggs... before that probally some fish that can walk on land..... which laided fish-that-can-walk-on-land eggs.... that came from little one-celled floaty things.. ... hmmm..