That's a riot. I've never heard (smelled) a chicken fart - not that I'm complaining. A beautiful cocker I had many years ago was named "Sparkle Farts," and she did!! Our first Cocker Brucie, when I was a kid, was famous for the 'silent and deadly" kind, he could really empty a room - fast. But the funniest thing was when he tooted he would turn around and frantically try to find where it came from.
"Butt tuba," love that expression will have to pass it on. Our family has some notable talent but, I better resist naming them .Don't 'cha love the ones that blame it on medication? Yeah - right. In an exercise group, the leader called it "releasing endrophins."