I have 2 hens, one is a white rock and the other is also white with random light gray feathers but i think it may be a mix of some sort that has a smaller body. They are nearly 6 months old and have not layed a single egg. I feed them layena crumbles and they always have fresh water and all the grass that they can eat. I also feed table scraps occasionally. Should they have layed eggs by now? Is anyone else having this problem too?