June Rountree was frantic when her dog, Abby, went missing, leaving behind just her collar and leash tied to a ground stake. For days, June and her husband searched for their beloved pet, but she was nowhere to be seen. The Rountrees started losing hope. But they couldn’t have anticipated getting their very own holiday miracle three weeks later: incredibly, the lost dog walked into Walmart and greeted June at her register during her shift at work. The 60-year-old cashier was just working her usual shift on Nov. 28, manning her register, when she heard a commotion and glanced up. To her astonishment and delight, she saw her 4-year-old black-and-white dog near the ice machine. “I said, ‘It can’t be,’” June recounted. People were trying to catch the dog, but as soon as Abby heard June’s voice, she came running over. “I called her name and she came to me,” …