Now that's really neat - normally, I'm more for the Minotaur variety (especially Harryhausen's "Minaton" from "Sinbad and the Eye of the Tiger"), but this is very good and a bit more "down to earth" (i.e. not a Minotaur) and "fantastic" (i.e. "living metal") at the same time.
Have you ever seen that Jason two-parter from a few years back? I seem to recall they had a nifty bullomaton in that one. Not a great movie, but that was nice, and your bull reminds me very favourably of it.
(Looks nice and metallic on my screen, too. I won't make any "irony is like bronzey, only made from iron" jokes, promise).