Just curious, if a small breed of hen that lays small eggs is crossed with a large breed rooster, assuming they were able to mate, and the chick was bigger than the hen, how would it fit in the egg? Would the egg be bigger? Would the embryo be stuffed? What would happen?
The size of the egg that a hen lays is not dictated by the size of the rooster that breeds her - it is controlled by her genetics, condition, and level of feed. The developing chick grows to the confines of the egg, hatches, and then grows to size dictated by it's genetics. If it is the product of a large fowl bantam cross, generally it grows to be mid sized.
