I guess this incident wasn't as minor as first described, and that taking him out of intensive care was premature...
Here is another noteworthy WaPo article on the shooting:
News of the Vice President's Misfire Hits A Fellow Bird Hunter Where It Hurts
Among his assertions:
*Whittington would surely have died if Cheney had been using the larger 12 guage shotgun favored by less experienced hunters, instead of a 28 guage shotgun. According to this article more expert hunters use the less powerful 28 guage to make for more of a challenge. I gather the payload of a 28 guage shell is about one third that of a 12 guage.
*Cheney had a responsibility to be aware of where all the other members of his party were, at all times.
*Cheney did not obey the "line of fire" rule.
The author offers an instance of one time when did not follow the "line of fire" rule, and almost caused a tragedy.