My lab/retriever mix is 14 and doing great.
My vet said about 10 is a good guess if they are pure breed.
Thats a lie my golden retriever lived to 16 and she ran away
Ten years is old. Large breed dogs are considered geriatric at 5-6 years of age. They can live longer than 10 years, however into their teens they are getting very old. Good Luck!
My dog is seven and my mom doesn't think he has much longer but he still acts like he did when he was a puppy (except for the hyperness).