The black bear was later euthanized by animal control, and her two cubs (which Roberts never saw during the attack, but assumes were close by) were tranquilized and moved to a wildlife shelter.
Roberts says he's gotten some negative feedback since he first shared his story on Facebook, with people saying he orphaned the bears because he was reckless. Others say he should have kept Pacer on a leash, and that he forced the bear to attack.
But he says those people don't know what they're talking about.
"The dog did not provoke the attack," he said. "If not for Pacer, I would have been mauled on the trail."