Here is how I make stock (exercising my stock options ):
1. Super stock - using a pressure cooker to pressure steam (a separate pot inside the PC) bones and meat, with NO WATER added. An hour later, you will get a cup of incredible stock.
2. Using the leftovers from #1 above, add water and PC. You will get your regular stock.
3. Using the leftovers from #2 another 45 minutes, you will get watery stock, which you will use next time to make #2 above.
After #3. part of the bones will become very soft. I eat that part of the bones for more nutrition.
dcarch