My RSL hens lay thin shelled brown eggs.So thin you could just poke a hole in them easy with your finger. I worry they wil break inside of them then I will have to did it out or cull them. I give the oyster shell all the time. Is there any other food I can give daily like kale or something to thicken the shells? My EE hens lay blue eggs and the shells are so hard you have to use a hammer.Lol,kidding but they ARE hard to break. Is this just a breed issue since they both get the same food? Thank you for your input.