Several years ago I hepled a doe out of a fence. She had attempted to jump a fence made of hog wire with two strands of barbed wire on top. When she jumped one of her back legs got caught between the barbed wire which twisted on her leg. She was laying on the ground with her leg in the wire when I drove past. I backed up and took a closer look, then tried to spread the wire so she could get out, but couldn't. I took my lug wrench and pryed the staples out of the fence post on several post giving the wire a little slack, I then put the lug wrence between the wire and twisted it until her leg came free. She layed there for what seemed 10 minutes, then stood, walked about 5-6 steps and looked back at me and gave a big snort and walked off.
I don't advise everyone to take this kind of action, I did it because there was a hog wire fence between us, and stayed far enough away to keep out of reach of her hoofs. They don't knnow you are trying to help them, and will hurt you if you are not carefuyl.