Yesterday I went to feed store to buy some grit. They said to use pigeon grit. And that's all they had in 50 pound bags. I normally don't use grit, just let the girls get it while they free range, but had 14 inches of snow last night. So needed to get some grit before the storm. Went to open the bag this morning and read the label. It says it mineralized pigeon grit. Should have paid better attention while at the store, but assumed the cashier knew what she was talking about. Can this be used for chickens? The first ingredient is limestone, then a bunch of other minerals and flavoring.... Didn't open it yet just in case I should return it. Let me know your ideas.... Thanks