@Paul *******
i think you misunderstood my comment
Local flights within the country are one thing. International flights I'm not sure there's any way to do in cabin. I was directly behind a woman with a very small dog in the approved carrier upon boarding and flight attendant told her to return to the boarding gate, wasn't interested at all about paperwork. Never saw her board the flight afterwards. I fly International a lot, and have never seen a pet on board so far