Interesting video of the findings of a study of some of the oldest Rottweilers in the US and Canada. The normal life span of a Rottie is 8 or 9 years, and 80% of the causes of death is cancer. The speaker studied Rotties that have lived up to 15 years old (almost double the average lifespan!), and found one of the correlations between long-life and behavioural traits to be sound environmental nerve.
I know Jean (of the many initials) often muses on the connection between a dog's mental state and chronic illness, i.e., a fearful shy dog is always stressed, which could contribute to many illnesses, and one more reason why people should only get dogs, if choosing the breeder route, from ethical breeders who test their stock for nerve strength. and health through work and performance venues that stress the dogs to reveal temperament weaknesses.
Some mild language, and the last few minutes are about encouraging science students to go out and actively observe the world instead of just reading about it but worth watching.
Watch "The Oldest Dogs As Our Greatest Teachers:Get The Words Out Of Your Eyes: David Waters at TEDxPurdueU" Video at TEDxTalks