I started a new flock recently. I was feeding Purina egg layer. I was getting very few eggs at first but just figured it was because they were just starting. Then when I finally started get at least four eggs a day out of 14 chickens I thought that maybe things would get better. They didn't. I kept only getting two to four eggs a day and most were three yokers. This happened for another month straight. Now I can see that happening on an occasion but this was consistent for about a month. Then I heard about the birth defects caused by GMO's. I took them off of commercial feed and started them on a mixture of wheat, crimped oats and timothy hay pellets and plan to add barley and millet. For scratch I use only wild bird seed with no corn in it. I supplement this with spinach and other fresh veggies, steamed carrots, watermelons and once in a while cooked whole grain rice with whole wheat bread as treats. After a couple of weeks they started laying good and the three yokers have stopped completely. Not even a two yoker. I started getting six to eleven eggs a day. Then they went down to two. They went into a molt which is what I was actually looking for info on when I saw this thread and thought I would share my GMO experience with. I changed my dog over to Blue Buffalo and am working on a diet for my cats. I have cut corn and factory farmed meat out of my diet completely.