What happens next?

How to make bone broth
Use cartilaginous bones.
Collagen, which is found in cartilaginous bones like the joints, neck, head and feet, renders gelatin. For chicken broth, use 2 chicken feet in addition to the other bones.
For beef broth, use sections of a calf's foot. You can find these things at your local butcher, or you can ask your local farmer to bring you some.