I just added two new white Leghorns to our flock and they haven't started laying yet. They are a year and half old. I got them from a friend of mine so I trust that they're age is accurate. They have been here a week now and still no eggs. Im not used to buying mature hens so is there something I'm missing? I usually raise everything from chicks. Do mature hens get that freaked out by moving them that they stop laying for awhile?