Dang! If I see this correctly, that pup went right for the middle, huh? Well, is the backing intact...isn't that what we're seeing beneath the damage? I would replace the top three or four pieces and the batting as previously suggested...by hand. And for the backing, if needed, I'd applique something that would tell the tale...a heart-shape, preferably made of gold colored fabric! By the way, that really is an attractive quilt...you did a fine job on it the first time...you'll get it back in shape...no doubts here!