So, I was looking at new brands and the Purina layer oyster strong layer feed we had been using for my older 2 Buff Orpingtons that are laying. I was looking for an All Flock because our two younger Cochins are in the small flock now.... I thought I bought All Flock and yesterday I realized I grabbed the bag of Layena Oyster Strong crumbles by Purina. They all have been eating it for about 4 weeks now My Cochins are 12 weeks. I know this is way too much Calcium for my younger girls. Have I permanently damaged any organs? I will be getting an All Flock today and some Oyster shells for the side. Ugh I was busy with looking at different brands because the Purina Layena Oyster strong just doesn't ferment well in my opinion. I got my self all confused and walked away not even paying attention to what I had grabbed.