How does the Dorgi's general longevity often compare to that of a purebred Corgi?

Answer

A healthy Dorgi may potentially gain a little extra time due to hybrid vigor.

The average purebred Corgi lifespan is cited as 12 to 13 years, suggesting that hybrid vigor may allow the Dorgi to potentially exceed that range, assuming they avoid inherited health issues.

How does the Dorgi's general longevity often compare to that of a purebred Corgi?
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