The way I make bone broth is to make a roast chicken dinner the day before (eat what we can and strip the rest of the meat off after for chicken salad and what not) then put it in a shallow water bath in a crock pot (or similar appliance) and add 2tbsp white vinegar to soften the bone to release the nutrients. After a few hours like that all the water to the top and add spices if you wish. Then I let it cook 12 hours or so. It is very simple really. You don't have to worry about it being ruined