Are we talking about McDonald's Chicken Nuggets?
Here are a couple of things I found about them. And you can check on the Internet about other "Natural Flavors" and lots of the many, many food items that can now legally contain MSG and other things we don't want to eat but are.
The Gross Truth About Natural Flavors « Raw Earth Living
Nov 4, 2010 ... When the phrase 'natural flavors' appears on a package, the best move is to ... we might have come close to ingesting fluid from the sex glands of beavers. ... When beavers are skinned for their fur, these glands are taken out, ... Don't use cosmetics that are made using animal products, read the ...
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