I have 4 hens - coming on 3 years old -they have been laying eggs steadily until about 6 weeks ago and have completely stopped - all of them. I did bring in a new hen but she is kept somewhere else. I have noticed - occassionally (not consistantly) watery poo here and there. two of my hens combs and wattles look paler than the rest. I have added diatematious earth to thier diets, dusted them and dusted thier coop. They free range 3 - 5 times a week. Thier coop has a 8' x 8' run. they have a light on at dusk and dawn as the days are now shorter. I did switch to an organic pellet but have switched them back to Layena and they have a flock block (nothing unusual about that though -they usually do). Any advice would be greatly appreciated.