HOw did this injury happen? It looks like the entire section of skin in this picture is messed up (including all the way to the left of the picture. JUDGING BY THE PICTURE, IN MY OPINION, This couldn't have been from one bite, it had to be a series of bites. Where were you when this happened? What exactly happened? I find it hard to believe that this much damage could have happned when the snake was constricting the rat. When a snake strikes a properly sized rat, it completely over powers it. As it squeezes, if the rat were to bite, it would only reach one spot of skin... It looks like there is a LARGE damaged section here. please give more details.