To do a dorsal skin.
a sharp scalpel or knife, tad bit of salt if its pretty skin. salt helps you grab onto it as well for the parts thats to the skin part you can go ahead and salt to salt that part for safty.
So I started out making a long cut i just dug my blade into the neck having the blad under the skin moved it down the back this saves from cutting soem of your fur on the outside and making an even cut.
I as well skinned down as much as i could do of skinnign the legs elbows, full belly where your just connected by the head/neck, tail( unless you cut the tailbone off to work on it seperetly) and feet.
to those who wants to case skin go here