I have a welsummer chick that is 2 weeks old and half the size of the other welsummer, same age. She eats, drinks, seems normal otherwise. She tends to stay near the heat more that the others. Is it possible the hatchery made a mistake on hatch dates? The bigger one is the same size as the domonique chicks a week older. Is one just giant or the other stunted? Their wing feathers are coming in slightly different color from each other, maybe they are not the same breed?