Animal Makers just posted a few on-screen props used in the film, "Batman, The Dark Knight". These were seen in the amazing fight scenes shot in Chicago and London. Of the two props, one is heavy (like a real dog), and the other is lighter (so allow it to be attached to the Batman). Commissioned specially for the film. This art is created entirely of artificial materials. No animal was harmed during it's creation. Here's a LINK to see what's being offered.