Frodo -- the final surviving dog from the infamous Michael Vick dogfighting ring -- has died ... officials at the BADRAP animal rescue org. confirmed on Monday.
The pup was estimated to be 15 years old.
According to BADRAP, Frodo was one of 48 dogs that were saved after Vick's dogfighting ring was broken up by law enforcement back in 2007.
The org. says Frodo found a new home following the former NFL star's arrest, and spent the last 14 years "being pampered like a prince with his new family.