I have 14 laying hens out of those, 13 lay in the nest boxes while 1 has only layed on the ground or on the floor of the coop. She is the only white leghorn I have the rest are Rhode Island Reds and a handful of Sex Links. I am not sure what is going on. I showed her the nest boxes on day one so she knows where they are. Is there anything I can do to encourage her to lay in the nest?