That's a mighty fancy version of a musher's dog box!

That's my friend, Shawn's, truck. He uses a flatbed and keeps the dog box on all year. I have a similar set up, but it fits on top of my pick-up box! It's a very safe way to transport dogs. I know guys who have had accidents with their dog team loaded in the boxes. The trucks have been damaged, the humans injured even, but the dogs have all been safe--scared and bruised, but safe!