I am feeding DuMor 16% organic Layer Crumble. It states that is contains between 4 - 5% calcium. I also treat using dried mealworms, and seasonal vegetables/fruits in small quantities.
I have ten 7 month old chickens. One or two of them are regularly laying eggs without the hard shell. The eggs just have in inner membrane holding them together. All of the chickens are eating the same feed- an organic feed from Purina along with oyster shells. I originally thought that this was...