Rotties have relatively short lives. My oldest is 8, and healthy, but neither of her parents lived much past 8. The one we rescued is close to 5 now, and is in good health.
I lost my male Rottie pup to parvo because my wife took him to the wrong vet. Our regular vet actually saves about 90%+ of his parvo patients that are on their feet and not passing blood. My mother-in-law's vet ain't worth a damn, that's who my wife took my male pup to. Sorry bastard didn't even call me and tell me my pup died. In fact, he didn't tell me my pup died when I called the 1st time. Then he said he threw him away. He sent me a bill for $85, I told him I'd stomp $85 out of his ass.
My black Lab lived to be 13, my bluetick lived to be 14 or so. My Manchester mix died last Friday, she'd been with my Mom for 5 years or so, and was 16.
The Golden's we had lived into their teens. My brother's Dalmation (used to play with my Manchester mix) died a month ago at 15.