Instead of pressure cooking when I make my chicken turkey soup, I use a large crock pot and slow cook the bones and meat for about 20-24 hours on low and it grinds so easily in a blender! If you do not want to crock pot your gravy, remove the bones and slow cook them in a small crock pot for about 20 hours with water to cover and you will end up with nutritional softened easy to grind bones as well a nice broth! It does not seem to work on duck leg bones as much, but I did manage to be able to grind the duck leg bone also which turned out creamy. Eleanor, Donald and the 14 spoiled rotten ferts [Posted in FML 6073]