I have had chickens for about three years now, but I have seen nothing like this. My chickens (three roosters, one three year old hen, four two year old hens, and four eight month old hens who have strangely never laid) ceased laying. I know it's winter and laying slows, but this time it slowed from four eggs a day in the summer, to two, to one in early fall, and now none. There are no other places they are laying their eggs, I assure you. I have tried increased oyster shell in their food, more protein, and various other dietary tweaks; but all in vain. The only other possibilities are egg eating chickens or other animals, right? What should I do to receive eggs again?