Judy , a pedigree pointer bitch , and the only dog registered as POW in Japanese hands , was born in Shanghai in 1937 , presented to the Royal Navy as a mascot to HMS Grasshopper . When the Grasshopper was bombed by the Japanese , Judy was captured and imprisoned at " Medan " where she was met and taken care of by Leading Aircraftman Frank Williams . Photo shows: Judy and Frank Williams at the Clifford Street , London PDSA ( People's Dispensary for Sick Animals ) 10 May 1948