Thanks for the comments. I got into the habit of feeding my chickens popcorn because they really love it and even look forward to it. When i walk to the coop they are ready for it. I asked because I began to see the egg shell easily cracking and wondered if the popcorn was substituting important dietary requirements for solid egg layers. Today I begin to provide them "scratch" which is corn and a few other nut s and what not for them to graze on to stay busy. In a few weeks I will be able to determine the effects. They love tomatoes too!!