What Does Green Mucus Mean In Dog Labor. Heavy uterine bleeding, abdominal pain, weakness, or other signs of maternal distress. If the mucus plug is green, bloody, or stinks, that's a red alert.

An unborn dog developing a mucus plug beneath the cervix makes the uterus and fetus less vulnerable. If the discharge appears and your dog has still not had puppies after a few hours, contact your vet for help. Puppies are stillborn or are alive but seem weak or not normal.