流浪狗大反攻

The anime title is: "Stray Dogs' Counterattack" Left-behind teenager A Cheng, lacking parental care, goes astray. After being accidentally transformed into a puppy by the mad scientist Hou Man, he must defeat Hou Man with the help of a group of stray dogs in order to revert to human form in time to see his dying grandmother one last time. Along this extraordinary journey, his wounded heart finds healing.