A man in Lamont California was cut on the calf by a knife or razor that was attached to the leg of a fighting bird. Here's a quote:

"I have never seen this type of incident," said Sgt. Martin King, a 24-year veteran who noted the major arteries that could have been severed. "People have been known to bleed out from those injuries if medical attention is not obtained immediately."

via Lamont man stabbed to death by cockfighting bird - Bakersfield.com.

I would never trade a human life for an animals life, especially a chicken, but the irony here is just too much. If you live by the sword, you're going to die by the sword, even if you're in the chicken fighting game. And for the record, when police investigated the scene they found five dead roosters and evidence of a cockfighting ring.