grit and calcium? Looks the same to me except for a slight difference in color. I have to look at what is in the bag to figure out which is which. I also doesn't seem like they are eating either of them. The calcium doesn't surprise me because no one is laying, but what about the grit? The free range for about 3 hours a day and are obviously eating a lot while they are out there because their feed consumption has gone down tremendously since they started getting their daily outings.