I laughed when I saw the picture, and then I read all these posts saying poor animal. I'm a bit shocked at the inital reaction really. The first thing that came to mind is exactly what northernmama and Dumas have implicated. A moose is obviously a huge animal, and he's not going to take anything mean-spirited from a human (unless the human has a gun, in which case the moose doesnt have much of a chance). But in this case, the use of the moose seems alright and not inhumane.
No hour of life is wasted that is spent in the saddle. ~Winston Churchill