I have a hen that just went broody 2 days ago. all 3 of my hens like to lay in the same nest in the same spot. My concern is that as the broody sets and the other gets in the nest w her that she'll see that egg and want to place it underneath her, which will result in staggered hatchlings. What should I do? I have another nest in there w/ 2 buckets that they could use as well but they want to lay in the one box!