Over the last 2 weeks, our roosters have been fertilizing our hens. I got, from what I think, is my first egg from the new flock I've been raising. My question is when do the eggs they lay start become fertilized? I used a flashlight after getting the egg from the box to check to see if it was fertilized and the egg was clear. I didn't see any kind of veins or spots. Any kind of help would be great! This is my first time with roosters and hens together so I would really love to hatch out some babies!