Iozzy its a shar pei "thing" mine used to go any opportunity he got, never let him off the lead the breeder said, but he slipped his lead in the park and I chased him for almost two hours, too worried to go home without hubby's beloved dog I sat on the park bench and cried, the minute he heard me cry he came trotting back and sat beside me ! All the time this was going on, our rescue dog stayed with me she did not go to join him ! probably because she had found the land of milk & honey coming to live at our house after a bad start, she was the dog who was soft as butter boaty.