Calcium makes them hard.
calcium
milk
milk
the blod of the heart and the heath
By definition all bone is hard. Before bone is fully formed it is made of cartilage and so is softer but it is not called bone at that time in development. Bone is made of hydroxyapetite mainly a calcium and phosphate salt. This makes it hard.
calcium and antioxidants
The main mineral is calcium.
Mineral salts from calcium and phosphorus compounds are essential for making bones hard and strong. calcium is the most essential mineral to make bones strong but not all bones are as hard as you think some bones are "Spongy" but we just dont notice it. hope this helps if you need to know this....
It makes them hard and strong, in the form of the mineral "calcium carbonate".
You could but they have lots of small bones in the meat and they have a nasty taste.
soft you can bend and hard you can not