Oyster shells is calcium right? and grit is just sand, right? Do I still need to provide grit (Sand) because they have the entire side of the house 10 X 50+ feet run with only dirt and pine shavings to scratch around in. They also when I am home get to run in the back and kill everything like bugs, flies, worms around the grass. So they have a lot of ways to peck at sand, rock and dirt? Grit Needed??
Thx
Steve
Thx
Steve