I have been a dog breeder for 31 years. Symtoms like that should never be left unchecked by a vet. You should not see leaking or a sac unless she is in labor. Sometimes when they have this and don't push it can be an infection . If you see a greenish discharge and no labor, get her to the vet as soon as you can.It often means a premature labor due to an infection that invaded the uterus.
If the sac has broken and she does not go into labor the puppy will die if the placenta seperates and it is not born quickly.
If the sac has broken and she does not go into labor the puppy will die if the placenta seperates and it is not born quickly.