What is the primary consideration when predicting the lifespan of any Bulldog crossbreed?

Answer

The genetic averages of the parent breeds and the non-Bulldog half of their DNA

Predicting the lifespan of a crossbreed depends on looking at the genetic averages of both parent breeds and understanding how the traits combine, as the outcome is highly dependent on the non-Bulldog half of the DNA.

What is the primary consideration when predicting the lifespan of any Bulldog crossbreed?
DogbulldogmixExpectancy