RE: Recovery, What to do After the Shot.
If you got 6" of penetration, you did get the chest cavity, although likely only one lung on a big buck. I dont think that hide to ribs is more than 4" thickat the shoulder on even a big buck like that. Where in the shoulder did you hit him? blood does look light colored on frost but it also might mean a lung.
Iassume you are just waiting a bit before going back after him. if he is still alive and mobileafter 4 hrs with that kind of hit he will probably survive unless its a hard winter. The bad part is with a chunk of arrow in him(?) he will not want to stay bedded. He will keep moving around.