I still haven't gotten any eggs out of my chickens this year. Some of my flock is still too young to lay eggs, but the remainder are old enough and have laid eggs in the past. We let them out to free range in the yard but have thier nesting boxes inside the coop. I've been looking around the whole yard and in dark spaces and cracks that they might shimmy in to but still nothing. Is this normal? Could they just be waiting for warmer days still?