Hang the animal from it's hind legs. This will allow blood to flow to the head. Also, it will aid in stretching the leg muscles. It's better to use gambrels. With the legs together, moisture can get trapped, providing a source for bacterial growth. It is preferable to age a deer with the hide. This helps to moderate the body temperature, and keeps the meat from drying. Daily, smell the inside of the carcass for odor. It should smell like deer, but not sour or pungent. Do not age a gut-shot deer.