Rat torture was a torture method with a history dating from ancient times to the modern day. It worked by putting hungry rats in a cage that was strapped to the victim.   

In some cases, the cage was slowly heated, making the distressed rats chew and claw through the victim, trying to escape.  

In others, the hungry rats would simply eat the victim alive. https://image.nostr.build/8cd05154da2c6be23c868fe1ddbf2011327d0f546179c7005c726e7663719d16.jpg