Balance of probability? What are we talking here, you have a great respect for your own opinion, so that is balanced heavily in your favour. That is very amusing to me.
I can't see how anyone can discount it. I have heard the heads of the Beef industries reason why it can't be true, and that was you would need to eat a whole cow. So how reliable are those "expert" words? Honestly, if that were true, we have a Mexican Soccer team and a guy who rode in the Tour De France, who all eat whole cows for dinner.
Money talks, bullshit walks. Our two players are likely victims of some money hungry farmer who wanted more money for his beef, but because no one else has been caught for it in NZ, it never happens.
What did you expect the Beef industry of NZ to say? Yeah, they probably got it from our meat, cmon, your easily persuaded to society's easy answers are best theory.