Didn't know deers drop sinew, I killed 4 and only saw antlers. Vendors not always have sinew until you reload unknown times and around level 15 it becomes boring to check all that vendors. The whole crafting process of a bow is more tedious in my case with two archers in the party.
I wonder why they didn't make raw meat to be the source of a sinew like ore is for the steel and iron.
