Check out the book “KING RAT” by James Clavell.
This is a provoking autobiographical novel by the reknown author.
Clavell was a POW in WWII and was held by the Japanese at the Changi prison on the eastern end of Singapore island as described in the novel.
To these POW’s rodent meat was just protein.
There's a coincidence. I just bought the DVD. Saw it in 1965 and never forgot it.