In the video, the boy can be seen riding a bicycle when a dog attacks. A cat is then seen charging and striking the dog.
Later in the video, the boy's bite wounds are shown. The father, Roger Triantafilo, who posted the video, says on YouTube, "My cat defends my son during a vicious dog attack and runs the dog off before he can do additional damage. Thankfully, my son is fine!"
Our sister station KBAK/KBFX in Bakersfield, California originally had this story.