Yes, 90% of bulldogs do require a c-section. To attempt a free-whelp
on your own could result in the death of your female and all of
her puppies. C-sections for bulldogs is required for several reasons
like: high rates of water puppies which can't pass through the birth
canal, large head and shoulders of the puppies, stress and heat
factors may cause a bulldog trouble, the ability to "PUSH"
out a full litter is often to much on a bulldog and other factors.
here for great photos of a canine c-section