I too am a compulsive nest checker .. and I am "testing" their sqaut reflexes ... my sex links [3 red and 1 black ] have only been laying 1-3 weeks [ one red started 3 weeks ago the others just started this week] , only one sings and 3 of the 4 are laying ... OH! AND they were squating for almost a month before they layed .... they were PAST 20 weeks when they finally put me out of my misery and gave me a darn egg . BUT since I am a nest checker I watched the first egg be layed .... If you are like me patience is not a strong point .... I was so relieved when they finally gave me an egg ... then I was always looking at the egg in disbelief...