Back to the bacon subject - I once saw bacon that included gluten in their ingredient list but it was a specialty seasoned bacon that is very uncommon. Aside from that I have never seen gluten in bacon. You must carefully scrutinize labels of things like chorizo, prosciutto and pancetta. Of course I scrutinize every single label of everything I buy but you know what I mean.
I worry about smoke flavour. If it says smoke, we're good to go but smoke flavour... I skip it... partially because I'm too lazy to call and ask. I just buy another brand. LOL