My French bulldog gave birth naturally to 6 healthy puppies 2 days ago (Tuesday 19th September). She has been an amazing mommy, feeding and cleaning them all until today when I noticed her dragging the only female pup by her back legs away from the rest of the puppies. We have been keeping a closer eye on them and this has happened 2 or 3 times now although she still appears to be letting her feed and still cleaning her. My partner also found mom lay in the opposite corner to the rest of the pups with the bitch underneath her. If he hadn't have found her when he did she would have suffocated. Is this deliberate behaviour and starting to reject her? Any help/advice appreciated! Sorry for the essay!