Actually Doggie Orcas will normally only ever eat the Sharks liver. I would also suggest you wouldn't get a Orca to eat anything already dead as they are extremely intelligent and fussy what they eat.
They will even live a seal alone if its not there preferred type

They actually say the hardest thing to teach a Dolphin or Orca is to eat dead food. Once you've cracked that everything else is super easy due to there high intelligence.
Edit: Just read the article. What a twit. How do people like that get a opinion ever printed