That's actually incorrect. I'm trying to find better links, but Boston Terriers frequently require c-sections for birth. "Three breeds were singled out as having caesarian rates of over eighty per cent – the French Bulldog at 81.3%, the Bulldog at 86.1% and the Boston Terrier at a remarkable 92.3%" [1].

Edit: Here's a more trust worthy source (and probably the source of info from the first link): http://www.ncbi.nlm.nih.gov/pubmed/20136998

1. http://blogs.telegraph.co.uk/news/peterwedderburn/9405067/wh...