Thanks for the suggestions. I am going to the feed store today and will see if I can find some feed with calcium. I also let my older girls hang around for life...they are part of the family, so they should be treated that way!
I have a hen that is a year and a half old. Since we built a new coop with new laying boxes, she stopped laying for 3 months, but now has begun, but the problem is that all her egg shells are so thin or none existent that the egg never makes it out of the laying box. None of my other hens have...