I picked up a hen about three weeks ago that was in a pen with a rooster. I saved all the eggs she laid (about 12 - except the ones I "tested" to see if they were fertile!) up until this past Tuesday when I placed them all in an incubater that I made myself. (I've never hatched eggs before) For the 1st time in 4 years our power went out Friday afternoon about 4:30 and didn't come back on until Saturday around 10:00 am. So, my husband insists that the hen needs to be mated every day to have fertile eggs, I said they could lay fertile eggs up until about 4 weeks after there is no rooster. Well, today, my DH decided to "test" one of the eggs to see if there was "anything in there". There was something in there. A tiny little beating heart... *he's never heard of candling....* So, the good news is that I have 8 eggs left and hopefully I'll get a few to hatch... the bad news... one of 'em just became dog food.