my chickens free range, my DH built them a really nice coop with nesting boxes which they have used consistently for a few weeks. i was down in the barn earlier and found a hen nested up on some hay and 2 eggs under her. i shooed her out of there and took the eggs away, but do i need to be worried that they somehow forgot their training? do i need to put golf balls back in the nest boxes? i don't want to be crawling all over the barn again and i'm confused why they'd stopped. thanks in advance.