The fashion of raising pets started in the industrial societies of 19th century Europe and has blown to the four corners of the Earth. Recently, Western countries have been breeding tens of thousands of puppies and exporting them to Asia, where the economies are booming. Asia has become the region with the biggest potential of creating a large stray-dog population on the heels of Europe and North America.
工業社會帶來的寵物風，已由十九世紀的歐洲吹向各國，近來西方國家每年繁殖數以萬計的幼種犬，外銷到經濟飛升的亞洲，亞洲繼歐、美之後，已成了製造流浪犬最具潛力的地區。