Replying to What supplements should i use on my dog?

im trying to turn my dog into a champion fighter because i hear you can make alot of money that way. Ive been running him up hills with a wagon full of rocks tied to his back and feeding him only red meat. I think if i went to GNC and got somthing like whey powder it would help his muscles get bigger faster which means i get richer quicker. so the question is what supplement should i buy for him? I was thinking muscle milk because that seems to be what all the strongest body builders use but im open to suggestion