Here is my last train car for a while. It is the Cattle Car.
Yes, I made some cows and hay stack to put into the Livestock Car. And, the door actually opens.
You view, copy, or download the car from Tinkercad using this link: https://www.tinkercad.com/things/bAp2Ixgy9Pk-livestock-car-v2
Sarah Cath's Adventures 
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Were you ever planning on releasing this model? Or maybe coming back to this project I find it one of your most impressive projects so far
Here is the link to the Public Livestock car. https://www.tinkercad.com/things/bAp2Ixgy9Pk-livestock-car-v2
If you search Tinkercad for SarahCath, you can see all of my projects. All of the train parts are public, they are all titled with the original name with V2 after it. After I finished the train, I create numerous buildings for my railroad town.