We have four chickens: an australorp, Rhode Island Red, red sex link and a brown leghorn. The brown leghorn is the one causing difficulties. She is the same age as all the others, who have been laying for almost a month. We're getting 2-3 eggs a day, but the leghorn persists in not laying anything. I thought they were supposed to be early maturing. Could something be wrong with her? She's the only one who is supposed to lay white eggs, and all of our eggs have definitely been brown so far.