This is the background info: 7 hens(4 less than a year, 3 probably spent hens), fed layer food and treats, and light on at night. The older hens were laying great then stopped for molting so I added some pullets to help with production. The hens never started again. Two of the pullets started to lay then stared egg eating and stopped laying. I have had chickens for 7 years and I never had this happen till now. I have had hens stop laying but they were at least 8. What is going on?!