I hatched out pullets in the spring and they are now around 30 weeks old. There were three in total. One started laying around 19 weeks old, has gone broody and is currently sitting on eggs. Another started laying at around 23 weeks old. However the third pullet still isn't laying. Does anyone have any suggestions for why this might be? She is in good condition, lives under the same conditions as the others. She was the smallest when they hatched however she is now the largest of the three of them. Breed is OEGB x pekin.