Look into Bone Broth. It is loaded with tons of mineral,and other stuff.
You will want to make your own of course. Not buying that canned stuff at the grocery stores.
You will come across some sites talking about lead in bone broth. Something to look into.
You need to maybe finding a source of grass fed beef etc.
I live in white tail deer country,and next season i will getting a source of bones from deer. It would probably be as close to grass fed beef for free.
P.S. Look into making your Broth with a pressure cooker.
It will be way faster. And the left over bones will be soft and brittle, and the dogs love them.