Why is packaged chicken labeled gluten free?

Marketing is a crazy business. Most of the time what is written on a label means nothing.

https://www.msn.com/en-us/health/nutrition/misleading-meat-labels-every-consumer-should-be-aware-of/ar-AAj3KA5?utm_medium=Social&utm_source=Unknown&utm_campaign=Leadify#page=2