I'd like to be able to feel their crops at the end of the day, but since this is the first night they've walked into the coop instead of having to be picked up and placed there I don't want to poke at them just as they've settled down. Do I need to reach in between their feathers and the roost, or does the crop overhang the roost entirely? What should I be feeling for? I assume a full crop would be easy to find, but what about one that's not full, or particularly soft?