Transfer of mites is noted on the pups as early as 16 hours4 but usually takes place within the first 2 to 3 days after birth.2, 3 Puppies born via cesarian section that have no contact with their mother to nurse will not have Demodex mites.2, 4 (todaysveterinarynurse.com)
General anesthesia is still used occasionally, but only for dire - emergency cesarian births where either an epidural is not available, it's contraindicated in the mother, or there isn't time to administer one. (skepticalob.com)
A surprising fact many may not know about these two breeds is that 90 % of all French Bulldog and Boston Terrier puppies are born via cesarian section. (blog.pawedin.com)