Manna Pro Poultry Grit
I got mine at Tractor & Farm Supply in the area even though the guy working there told me that it has calcium in it when I asked him. Now I looked on the bag, front and back, and I saw nothing that mentioned calcium. It just says "Insoluble Crushed Grit". So now I'm wondering if I even have to go anywhere else for grit. What do you think?