My three gals just started laying yesterday. One from the roost (broken on ground), the other on a paver in the yard, and the next one actually went to the nest! Second day, one on coop floor--broken open, the next in the pen on the ground, and the third in the nest again. So far, 6 eggs, and two broken. What can I do to get the girls interested in the nest? Do fake eggs really make a difference? Should I get another nest for three laying pullets...soon to be 5 laying. What measurments and materials do you recommend?