The first video posted to YouTube shows Jules barking and snapping at the bears and chasing one of them over a fence surrounding the family's home. A second video from another perspective shows a bear colliding with a porch swing while fleeing from the canine.
"She wasn't having it, you're not coming in to her property," Hernandez told CBS Los Angeles. "She blew me away, couldn't believe that she turned into a wolverine."
Hernandez said he has taken bear safety steps at his home including boarding up his daughter's bedroom window, but some neighbors continue to encourage the visits by putting food out for the animals.
"It is a crime, you can do jail time if you're caught doing it. Some of my neighbors give them dog food in 25-pound bags," Hernandez said, "There's one lady in the neighborhood who actually makes them meatloaf."