This guy was trying to protect his dog and himself.
"That wildlife biologist shot the bear a second time and killed it."
Technically, the biologist -killed- it.
Why didn't he "rescue and rehabilitate" it instead?
After all, if bears are just cuddly critters who mean no harm to humans, it shouldn't have been too hard to capture and take to a vet.
The one poster was dead on though.
Whatever possessed him to make that call?
Shoot, shovel, shut up.
I wouldn't use a shotgun on bear unless it was heavy buckshot or slugs.
Individual pellets have about the same energy whether from a .410, 20 ga, 12 ga or 10 ga. It's the number of pellets carried to the target that is different.
You'd have to be very, very lucky to kill a bear with any kind of birdshot. The bear may have even recovered.
That being said, I don't know if he used birdshot or not. Buckshot and slugs aren't common for 10 gauges, though.