If resting on their side, place them so the large end is slightly higher than the small end. Draw an x on one side and an o on the other so that when they lay on their side, you only see the one letter (each egg showing the same letter). Three to five times a day, gently roll all of the eggs so that you see the opposite letter. Roll them an odd number of times each day so that their night hours are spent on the opposite side of the night before. The exact time doesn't matter, find something that works with your schedule and can be relatively consistent. Maybe when u wake up, get home from work, and bedtime. For chicken eggs, turn for the first 18 days.