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."
But, sadly, the org. says he died on Saturday ... though they did note the dog had one final steak before he passed away.
Officials at the org. say two other known surviving dogs from the Vick case died recently as well.
As we previously reported, Vick was released from the Atlanta Falcons and also spent time behind bars over his role in the case.
The ex-quarterback did apologize for it all ... and he later went on to start for the Philadelphia Eagles following his release from prison.
He's since fought tirelessly against animal abuse ... even advocating at the Pennsylvania House of Representatives in 2015 to pass a bill to allow cops to rescue pets from hot cars.
Vick ultimately left the NFL following the 2015 season, and he now works as an analyst breaking down games for FOX.