A Family Watchdog

(1st person POV) On the day of the accident that killed Tadashi, there was more than Callaghan whose life was saved. Hiro is about to find out that his brother was saved, experimented on, and became a puppy who had his brother's thoughts and memories. Wanting to protect him, Hiro tries to find ways to look after his big bro whilst attempting to figure out how to transform him back