She probably has nerve damage from getting caught in the netting. Hopefully it will improve. I have used non-electrified poultry netting for years, and the chickens never got caught into it (although the cats and dogs on the other side had to get used to it.) So I would guess that she may have been trying to escape a chicken chasing and pecking her. Then getting caught in the netting she may have fought to free herself. When caught and injured, another chicken really pecked her head.