What you need to worry about is the calcium to phosphorus ratio.
Unfortunately, all bone is high in phosphorus and so when you feed meat and bones, you are still getting more phosphorus than calcium.
Bones should be considered a mineral supplement
, not a calcium supplement.
In nature, the best source of calcium for our pets is the blood. In lieu of blood, we use ground egg shells which are high in calcium and low in phosphorus to help balance the calcium to phosphorus ratio.