My new group of pullets are just starting to lay (Yay!). But I have one pullet who has spent most of the last 3 days in the nest box. She fluffs around in there, making the wood shavings into a bowl and even has sung the egg song a few times, but has not laid an egg. Is this normal? Should I worry that she is egg bound? I have 2 older hens laying that hopefully are demonstrating normal egg laying for the pullets. I tried to feel around her backside but did not feel an egg inside. Thanks for any help!