I have four free range hens who have been faithfully laying their eggs inside their nest box since the fall when they started to lay. Now in the past week I've found three eggs all outside the coop, randomly in the middle of my backyard -unhidden, no attempt to make their own nest... It's as if they just couldn't hold it in and let it drop where it may?! Is this a health concern at all or a sign of one? There are no other strange behaviors that I can tell. Thanks!