A runaway dog informed her owners of her return by ringing the doorbell at 3 a.m. in the morning. A puppy named Rajah disappeared from her owner’s home for over seven hours after being scared by fireworks. Owner Mary Lynn, 23, from Greenville, South Carolina, drove around the neighborhood and posted on Facebook about their missing 18-month-old pup, only for Rajah to ring the doorbell when she returned home in the early hours. “She was in the backyard with our other dog and our neighbor started shooting off fireworks and I knew she’d be scared,” Lynn said. “I went to the backyard,  and she was gone.” Lynn and her husband Ryan looked for Rajah, recruited others in the search, and even created a Facebook post about the missing rescue dog. “My husband came home and was driving around looking for her,” she said. “We were ready to call all the shelters …