An Iowa family’s beloved dog became their biggest hero after she saved their lives during a carbon monoxide scare at home. It happened just five days before Christmas. Brad Harbert, from Ankeny, Iowa, was woken at around 12:45 p.m. by the family dog, Roxy, licking his face and howling. “Roxy was jumping on and off the bed, shaking, howling, and shivering,” Harbert, 37, told The Epoch Times. “I awoke to the loud chirping of the carbon monoxide detector going off.” It had taken almost 20 minutes for the noise to rouse him from deep sleep, he surmised; their 7-year-old husky-coon hound mix helped stir them awake. “I shot up from bed,” said Harbert. “I opened my son’s door, and Roxy jumped up on his bed, made sure he was alive, and licked his face. I woke him up to get his slippers and coat on, as we needed to get out of …