In my opinion, it all boils down to what the focus is within the contest.

If your focus is "winning at all costs," then you are liable to "do anything" to win, including cheating.

Having metal teeth is simply cheating. There is no part of a dog's body that is comprised of metal, and if your dog's teeth naturally suck, then your dog might just be an unfit specimen.

Ideally-speaking, these contests are designed to find our which dog is better, naturally, FOR BREEDING AND BREED-ENHANCING PURPOSES, not to see which owner/handler can cheat the other or come up with the right chemicals/implants/armor, etc. to eek-out a win.

And speaking of teeth, TRULY good dogs can still win without them

The issues of steroids, banamine, etc. are all rife with debate and controversy. Even the human sports of boxing, baseball, etc. shun the idea of steroids. Bicyclists have had their titles removed for steroid use. Therefore steroids are almost universally considered cheating and not "clean sportsmanship."

Denial of this simple fact isn't rebuttal; it is only denial.

Jack