OK, it's a flat-bed bale hauler around here! Hydra bed is a brand name. Not sure if that's the brand used here, or not.
I wonder if more people in this area use a double fork on the back of the tractor and put a couple of bales on the loader, since the tractor is needed anyway.
A hay saving alternative is a bale processor, which is what we use. It also can be used to apply molasses to the hay effectively, as it is processed. It can be set to chop the hay shorter for calves or longer for cows & bulls. Cattle leave almost none of the processed hay for expensive 'bedding'.
mrj