These are our first chickens as a forward. We have six Plymouth Barred Rock hens. They are all approximately 26 weeks old. Two of our hens started laying around the 6th of September, but for the past four days we haven't seen any eggs. The few eggs we did receive were all perfect if small. All of the birds appear healthy and in no visible distress. We do let them roam the garden and that's the first place I checked since there were no eggs in the nests. I understand that each bird will have its quirks but for both of the two that were laying to just stop seems odd. Any suggestions?