I have an opportunity to incubate some eggs. Im not sure if they are fertillised or not, but i have some eggs in the back yard that have been layed in the last two days. I wouldnt be able to get them to the incubator until tomorrow How long do you have from laying until you should incubate the eggs. if they have been out in the cold overnight are they no good? if i get the warm ones from today will they be ok to go in there tomorrow? And will i be able to tell if they are fertilised? Sorry for a heap of questions. My girls arnt broody so they are not being sat on, and they dont sleep in the coop at night (they like to sleep on the roof for some strange reason) so they wouldnt have been kept warm over night. Should i bring them in tonight and leave them in the carton? cheers all for any help!