Two of our Sumatra pullets hatched on Jan 2nd, 2011 (27 weeks old) and they have not begun to lay any eggs or even shown any interest in getting in the nest boxes. The other one hatched on Jan 18th, 2011 (25 weeks old) and no eggs from it either. I put a ceramic egg in one of the nest boxes hoping to draw some interest but have had no luck. There is a cockerel in the coop with them. I know it is hot but there are 4 hens (2 Buckeye and 2 Andalusian) in the coop next to them in the barn and they are laying eggs. All other laying hens (Ameraucana, OEGB, Hamburg, Buttercup) in the yard are laying in-spite of the heat. The other breeds of pullets hatched around the same time frame have already begun to lay their eggs. We do not have a light on in the barn due to the heat but during the day it is light in there just not the sun shining in. Hasn't effected the other two breeds. What is the deal with the Sumatra Pullets? Is there something I am not doing that they need verses other breeds?