In 2013, a study found that mixed breeds live on average 1.2 years longer than pure breeds, and that increasing body-weight was negatively correlated with longevity (i.e. the heavier the dog the shorter its lifespan).
In 2013 , a study found that mixed breeds live on average 1.2 years longer than pure breeds , and that increasing body - weight was negatively correlated with longevity ( i.e. the heavier the dog the shorter its lifespan ) .
Typically, how much longer do mixed breeds live?
Typically , how much longer do mixed breeds live ?
1.2 years longer
1.2 years longer