TL;DR: If your dog has been straining for over an hour without producing a puppy, she is experiencing a medical emergency called dystocia and requires immediate veterinary intervention to save the mother and her puppies.
What is active labor and how do I know if my dog is experiencing dystocia?
- When a dog enters the second stage of labor, she begins active abdominal contractions to push the puppies out.
- Under normal circumstances, a puppy should be delivered within 30 to 60 minutes of these strong contractions starting.
- If your dog has been straining for over an hour without producing a puppy, she is experiencing dystocia, which means a difficult birth or stalled labor.
How urgent is it if my dog is straining without producing a puppy?
- This is a high-priority medical emergency requiring immediate veterinary intervention.
- Prolonged labor suggests a puppy may be stuck, too large for the birth canal, or the mother's uterus is exhausted.
- Without help, there is a significant risk of losing the puppies and potentially the mother due to exhaustion, infection, or internal injury.
Why should I provide a photo of my dog to the triage team?
- A clear photo of the mother's vulva area helps a veterinarian see if a puppy is breech, stuck, or partially visible.
- The medical team can check for a placental sac or identify abnormal discharge such as dark green, black, or excessive bloody fluid.
- This visual evidence helps the clinic determine the level of obstruction and prepare for an emergency C-section or manual assistance before you arrive.
Clinical Context (Merck Veterinary Manual)
Dystocia should be considered an emergency in dogs experiencing strong abdominal contractions for 1-2 hours without passage of a puppy or if active labor lasts for 1-2 hours without delivery of subsequent puppies. Other indicators of dystocia include a resting period during active labor lasting >4-6 hours, obvious pain (crying, licking, or biting the vulva), or abnormal vulvar discharge (frank blood or dark green discharge before any neonates are born, indicating placental separation).
Chapter: Reproduction
Source: The Merck Veterinary Manual, 11th Edition (Page 1395)