At long last I present to you all a train car to go behind my Z-6 challenger: The Pig Palace Car
This type of car was used exclusively to haul animals like pigs. They were unusual because unlike most other freight cars, this one was a double decker freight car. Its small space allowed animals like pigs to ride on it with ease. It has a straw bed inside as well as troughs to keep them fed for longer journeys. This particular Pig Palace Car will hold up to 18 pigs.
This will soon be on Lego Ideas soon. I will post the link when it comes up. It already is on Bricklink for a 3D view.