Have you ever been on a flight with a working dog? This Air Force K9 bomb sniffing dog got to travel in style, with his own seat and informative collar:
(source)
The dog looks so cute that you almost cannot resist petting him, regardless of what his collar may say! I have never had the opportunity of traveling with such a well trained dog, only ones in little carriers under the seats of their owners. It makes sense that these dogs would get to travel this way, it is far safer for the dog.
— Fizz Pig