Hi, I am also getting concerned about soft/shellless eggs being laid by my girls. I have 4 in 2 coops, 1 coop is a bluebelle that has been with me for 3.5 years and was unknown age when I had her, as she was laying daily I estimated her to be 2 years old so now would be 5.5 years old roughly, the other bird is a ex-caged rescue from August 2016 and she recovered from oven ready to be fully feathered and has padded out the bones so to speak without being fat, these seem to have started laying shelless eggs a couple of weeks ago which is in line with last year but I would of hoped that I would of seen signs of a shell by now. The other coop has 2 ex-free range rescues from April 18, these came to me in good condition and one has been bullied and had some of her feathers ripped out by the other group during attempts to merge them so these are now kept seperate, her flock mate is in good condition and doesn't get bullied by the others. these hens were laying 1 or 2 eggs a day until before Christmas when normal usable eggs are now 3-6 per week and there might be evidence of another 4 to 6 broken soft shelled eggs in the coop. These I always find the shell. Both groups of hens get the same feed - heygates country layers pellets, and have had acv in the water last week, they are twice a week fed salad as a treat, no corn is given. Both coops have 2 tubs of Jontos mixed poultry grit which supposedly has both types of grit in and I do occassionally see the girls dip there beaks in it. I have this week baked and ground up the eggshells and added them to the layers pellets. Is there anything I can do that I haven't already? They are allowed to roam part of the garden behind fencing but all the grass and green of any description has gone, attempts to reseed have failed and planting of quick grown herbs has also been eliminated by them, the ground is clay and is a quagmire at the moment as it was last year and the year before.