What's the difference between a wolf bone and a tiger bone?

Tiger leg bones have obvious edges, and the surface is yellow-white or gray-white, delicate and oily. Weight, solid cavity can be seen on section, accounting for 1/3, and bone marrow is reticular and grayish yellow. The bones of the front and rear limbs are both upper and lower segments, the upper segment is a single bone and the lower segment is two bones. Among them, there is a flat long hole near the bone ring at the lower end of the upper limb, commonly known as "Phoenix Eye". Two bones of the lower limb stand side by side, slightly flat and slightly twisted, one of which is longer; The upper limb is cylindrical, with a round shaft inside the upper end and a rectangular groove (where the kneecap is located) at the lower end. The kneecap (tiger bone) is rectangular, with smooth surface and often tongue-shaped ribs. The main bone of the lower limb is thick and triangular, and the other bone is thin (bone). There are 5 toes on the front foot, 4 toes on the back foot, and short claw hooks at the toe ends.