Finicky Eater with Egg Shells Rapidly Getting Softer

I hope someone can help me. Forgive me if I'm posting in the wrong manner. My hen has always been a good layer. She is free range in my urban back yard for the last 3 years. She is so picky. I had her on Layena, which after a while, wouldn't eat it, and then I later found a recipe for a mix that was supposed to be so good for her. I spent so much on all the ingredients only to have her pick here and there and walk away, never to return to it. I read about soaking and feeding the fermented feed, but that didn't even interest her. Waste. I've also tried pellets as well as the crumble. I just put the Layena back by itself and I hardly ever see her eat out of it. Of course, I don't watch her 24/7. I do give her scrambled eggs occasionally and I always mix in finely crushed eggshells. She has a dish of oyster shell available. Her eggs have been getting softer and softer until they are like a water balloon. She has crushed a few in her box. I added more bedding for a deep cushioning, as well as getting the egg asap before she sits on it to lay again. I'm afraid she'll get egg bound soon. I can't figure out how to get the calcium she needs into that stubborn girl. I was hoping that all the bugs, creatures, roots, etc, that she gets from the yard would sustain her. Oh, and when I say picky, she won't eat anything I offer from the produce I have, except squash. No strawberries, grapes, lettuce, carrots, peas, corn, sunflower seeds, melon, you name it, she won't eat it. She does peck through the seed waste that falls out of my finch aviary and cockatiel aviary. Otherwise, she seems to be perky. Oh, and when I give my dogs their wet food, THEN she comes running. So, I could possibly hide something in the dog food if anyone can help with what to do about increasingly soft shells.

 

Thank you so much! It was Layena crumble that she was on and when I saw that she was not eating it, I thought I'd try the pellets to see if that appealed to her. There was so much crumble dust that I thought she wasn't able to pick up anything and lost interest, hence going to the pellet. She definitely didn't want the pellet. I will go back to the crumble and rest assured she won't starve herself. I just couldn't see how my yard, though very lush for insects, snails, etc, could provide enough to sustain her, so that's why I would give her egg, a big tablespoon of dog food when she came around, just in desperation to know she ate SOMETHING. I even stooped to buying the giant mealworms from the pet store to make ME feel better that she got nutrition. Thank you very much for the support! (And no more dog food! =]

 

Thank you! I WILL increase the shell(from other eggs than hers). There was a time when I could just put the dried out, crumbled shells on the ground and she'd pick at it with eagerness. Then, she stopped. I am hopeful this corrects her problem.