A third proper practice is to get the cape off the head and let it cool. Incisions on deer should begin in the belly leaving the back skin attached. Only proper cuts should be made from the belly to the chest and on to the legs. Bacteria grows quickly. If you're in the backcountry, bring non-iodized feed salt.
Iodized salt ruins the hide.
Don't be bashful with salt. Freeman has other rules especially for other game such as bobcats, fox, coyotes, etc. Freeze the animal in whole using several garbage bags. Then, get to the taxidermist as soon as possible. Also, do not gut turkeys and other birds.