If I had that, I'd tear into the outer skin. Giving it an either bone, or bloody flesh look. Wouldn't rip it all off, just a few patches. Maybe part of its face. Then recreate the open parts to give it a look for a half zombie/ripped up pooch. Also would dirty up the remaining fur. Water and dirt/grit like gravel dirt rubbed in here and there. I'm not as creative as most the people here. But that's my thoughts on it when I saw the video.