Any idea what model this machine is? Does Deere make it or is it something custom?

[terryknight]

that's pretty cool, now if could find that 466 powered pick up

 

[MossRoad]

This explains it ..Local Innovation - Self-propelled Silage Wagon - Coffee Shop - Red Power Magazine Community

Good link! Thanks. Maybe someone can turn him in to Successful Farming Machinery Show?

 

[JJZ 109]

Sure looks like chopped silage on the cab roof and a little on the hood.
It's not articulated, you can see the steering gear under the front axle.

Yup. It looks like a forage box or "chopper wagon" on the back.