when the original bulldog and terrier crosses came about,the bulldog of the day was a far different beast from the f****d up monstrosity of today! i would say, if the cross took place, both animals (bull and terrier) had something to add to the mix. in this day and age, i'd say a good honest working earth dog has equal gameness to a sporting bred "bulldawg"...he just uses it in different ways....j.m.o.yokel
from what I've read yokel they both added tenacity, the bulldog added gameness(if that's the correct term for the original bulldog) from being bred for baiting and the terrier added agil