the hair missing on the back is simply explained.the buck i shot the year had very wide antlers so he could reach to his back if he had an itch.from rubbing the itch with his antlers and against things,he rubbed the hair off.also check out hair loss at the leg joints by that gland.they rub the gland together to get that musky tarsal gland stuff to come out to make scrapes and rub all the hair off.brisket means breeding.

slayer