So, while there isn't unanimous agreement or a causal link …

So, while there isn't unanimous agreement or a causal link directly from owning a dog to living longer, there's substantial evidence suggesting that dogs can contribute positively to several factors that are known to influence longevity and quality of life. Simply owning a dog doesn't guarantee a longer life, but the lifestyle changes, companionship, and health benefits associated with being a responsible pet owner might indeed contribute to a healthier, potentially longer life.