I have 7 pullets black sex link. well their parent were black sex link. anyway i free ranger my bird so i don't know which girl is laying . I have coop that the roost at night but i never close the door. My dog chase everything away the venture their near the farm. I find two eggs everyday. Is there a way of know which one laid the eggs? Also i heard that if hens lay eggs this late in the year they will probably lay through winter is that true?