In fact, changing Shaggy’s diet was a condition to get Kasem to voice the character again. Kasem quit in the 1990s and was replaced by Billy West and Scott Innes when he refused to voice Shaggy in a Burger King commercial. So when the producers of What’s New, Scooby Doo? tried to get Casey Kasem back, he insisted on the change to Shaggy being made.
spoiler
That’s Casey Kasem and Rob Zombie btw.
Ruh roh raggy!
https://screenrant.com/scooby-doo-shaggy-vegetarian-casey-kasem-true-story/
Shout out to a real one