read ^^^^^ there.You can sprinkle food grade DE on their food or put it in their water. They also love to take dust baths in it. It's great for controlling moisture in the coop as well as insects in the coop and on birds. I'm not positive but I think I read somewhere that the DE with the clay in it becomes non-food grade for humans. Food grade DE by itself is very beneficial for both external and internal use. You don't really need the clay in it. I'm pretty sure it's added to DE more for the absorbent properties.
