Sorry to bring up an old thread (Is this okay? I couldn't see in the rules), but I just wanted to chime in when I saw this topic.
One of my buns, Theodore, is one of Darius' babies.
I just wanted to let everyone know that Darius is still very much alive and well!
The lady who owns him was, I admit, fairly eccentric, but she's really lovely and cares about her rabbits.
As far as I could see she knows what she's doing and she takes good care of them. I think the comment about however many carrots was a thing for the cameras, she definitely knows the proper diet for a bun.
She's had a few Guinness World Record holders and Darius is the current one.
The record is for length not weight precisely so people don't overfeed to try and get the record.