I had two bucks show up with identical back injures. At first I though someone was a bad shot. Ive seen this same injury before and don't think its from an arrow or bullet.
Kinda thinking its an antler injury from fighting.
They amaze me to this day. On one hand they're medium sized game and just not that hard to kill. On the other hand they're one tough critter. They can still survive with serious injuries against all odds. Imagine having that hole in your back.
The op's pics look like fence to me. Every fence crossing I have has hair attached to it. I've sat fence crossings many times and most deer will go to great efforts to keep from jumping them (even though they hop over them like it's nothing).