When giving birth in dogs is it normal for the birthing sack to come out with a green fluid?

Yes, it is normal for the birthing sac to come out with a green fluid when a dog is giving birth. This fluid is called the amniotic fluid and it surrounds and cushions the puppies during pregnancy. The green color of the fluid is caused by the presence of meconium, which is the first feces that the puppies produce. The presence of meconium in the amniotic fluid is normal and does not indicate any health problems. However, if the amniotic fluid is dark green or black, it could be a sign of a problem and you should contact your veterinarian immediately.