I have a small flock of hens and one rooster. The rooster is certainly doing his job, but, to date, I haven't seen any fertile eggs. How long after an egg is laid before it develops a visible embryo? I've been candling the eggs with a flashlight and have not seen anything, so they go in the fridge. Now another backyard flock keeper who is a neighbor tells me they are probably fertile, but when I put them in the fridge it stops the process. We collect at least once a day. The neighbor would like some fertile eggs for her broody hen. Can I just give her some eggs hot off the press, so to speak, and they can be hatched by her hen? Thanks for your input. I'm new to the forum and, as you can tell, new to chickens. We love 'em and spoil them a bit.