Well this is quite the mutation your dog has going on. The mutagen has turned your dog into a Teenage Mutant Ninja Turtle. The Leonardo Ninja Turtle Dog Costume is a way for your dog to join in on the Halloween festivities this year. This costume for him features a green jumpsuit that shows off the front of the shell. The turtle shell is also included and goes right onto the back of your dog, really making the transformation complete. A blue eyemask headpiece finishes the look so that your dog can become Leonardo, the leader of the turtles. We don't know if he'll stop barking, but he'll definitely enjoy pizza just as much as these fun loving turtles do. From a regular dog to a Teenage Mutant ninja Turtle is a huge, and funny, transformation on Halloween.