This is true!! I did zoology at uni and they actually teach you about this as a case of how metabolism doesn't increase with size. It's like giving a 120kg guy four times the amount of a 60kg guy - talk about fuck your system. Mind you, they do this shit to rodents all the time and no-one notices. One elephant and the world was up in arms (bet they won't do that again!)
Seems that they might of apollo