I'VE READ ON METZER FARMS SITE THAT 17HRS DAYLIGHT FOR OPTIMAL EGG LAYING. ALL MY GIRLS ARE LAYING EVERYDAY WITH 9HRS OF DAYLIGHT, NO ARTIFICIAL LIGHT. WHOAH AND WOW! THEY EGGS HAVE BEEN FERTILE. DON'T KNOW WHEN THEY ARE "FOOLING AROUND" AS I HAVE THEM LOCKED UP MOST DAYS SINCE WE'RE HEADING TOWARDS HEAVY PREDATOR SEASON, AND THEIR KIDDIE POOL IS NOT ACCESSIBLE. GUESS THEY ARE "DOING IT" THOUGH. 
