I have a 1 year old chicken who lays light green eggs, about 5-6 a week. She has always had calcium deposits on the pointed end of the egg so I figured she was getting plenty of Ca in her diet but three times in the last two months she has laid an egg that was soft and broke easily or was crushed in the nest due to softness. I have also recently noticed that my scrambled eggs had very slight crunch as if there was a shell bit in there. When I cracked her egg for breakfast this morning, I realized that there were what appeared to be the same small dots of calcium that I see outside her egg. She is my only green egg layer so I know it was from her egg. What can I do? What is causing this? She is fed egg layer food with oyster shell but is able to be out all day and can free range in our yard and also really enjoys table scraps.