I have a friend at work that had barred rock chickens. ( 3 roosters and 15 hens) he sells the eggs at work and stores them in the fridge. How long will they be fertile for. can I put the eggs from the fridge into my incubator or would that kill the eggs. It will be hard for him to bring them in fresh for me cause we don't live close to the office and not there each day. I have hatched eggs before and had 3 of 12 hatch and want to try again and really want to gethis eggs cause I like the breed he has and cant get them from our hatchery here.