A beloved dog has been reunited with her owner after four months missing – but mystery surrounds her time away from home. One-year-old cocker spaniel Penny disappeared in December after slipping her collar while on a walk in Canterbury. As the weeks passed without any news, and despite widespread appeals, hope faded that she would ever return home safely. But on Thursday she was spotted in a country lane four miles away, with an emotional video showing the moment she was handed back to owner Kathleen Green. “It was amazing when we got her back,” Miss Green, 21, said. “When she saw me she was s…