When the pullets are 16 to 18 weeks of age, let them have access to nests during the day. Provide at least one nest for each four hens. In the evening remove all birds from the nests and close the opening so that the pullets cannot re-enter them for overnight roosting. Nests should be opened again in the early morning. These steps will get the pullets in the habit of using nests. Persistent floor layers can be trained by picking them up and putting them on the nest.