thresa Mansfield, Ohio 10/10/2012 7:01:12 AM There are bitches that pull on the cord when cleaning, that will actually put their paw on pup and pull.. the can pull hard enough that they pull intestines out... I have a bitch that has had several pups bred to same male no problems.. her last litter she had a c-section and was more nervous with the pup pulling on them.. hence ended up with 2 in the same litter, even though none of her previous pups had ever had any....SO the only conclusion is that she caused it...