Our Barred Rock is 27 weeks tomorrow. She was the first of our girls to start the submissive squat over 6 weeks ago and was also the first to check out the nesting boxes. She spends a lot of time rearranging them and gets all cuddled up inside and will sit in there for long periods of time but NO EGGS! Our Delaware was the second to squat and has been laying for 2 1/2 weeks already. should I be worried? I have checked her vent and don't see anything unusual. TIA