Here are a couple of examples of how custom we can get. One is a monster four dog seutp. The lower crates have front and rear doors. There is a ton of ventilation in these crates to keep your dogs cool.
They latch together for easy removal if you want to clean and vacuum. The other setup is a two dog setup designed to fit either in the back of the van on top of a bed, or stack one on top of the other behind the drivers seat.
You could call it a crate transformer.