I have a mixed flock with several older (3-4 yrs old) and the rest in their second season. 14 total . I am getting approx. 9 eggs a day but a third of them are so soft they rarely make it out of the box. I am feeding egg producer 21 % protein and have oyster shell in the food tray and on the ground. They do not get to forage and I give about 3/4 cup of black oil sunflower seeds a day. a lot of them have naked necks due to what almost seems like "boredom" pecking. they just let themselves be plucked by the others. They have a very large pen, and no exterior parasites. Any thoughts would be appreciated !