I think it’s my barred rock that is having laying issues. First we were running into the barred rock and the lavender Orpington breaking and eating the eggs. We added fake eggs and that seem to help a little bit. But now we’re getting shellless eggs and or very weak eggs. I have a oyster shells always in their feed and we’ve been grinding up eggshells and putting it in their feed. I also fed them some cooked broccoli and corn, hoping that helps with vitamins . Also one waterer has apple cider vinegar with mother mixed in. I was reading some of the other threads wondering if it’s another issue but just not sure. Today I got this very thin shell egg which accidentally broke so I fried it and gave it back to chickens. I know the orange yoke is supposed to be desirable, but I’m not really doing anything different that would cause that. Do you think it’s from the feed or there’s something else going on? About three weeks ago we just finished a bag of black sunflower seeds. So that shouldn’t have affected it now?. With so many variables it doesn’t seem like any of the other things with similar issues. This chicken is 2 years old. Acts normal otherwise.