After a dog gives birth, some discharge, fatigue, and reduced appetite are completely normal for the first day or two. But certain signs point to serious complications that can become life-threatening within hours. Knowing the difference between normal postpartum recovery and a genuine emergency can save your dog’s life and protect her puppies.
Vaginal Discharge That Changes for the Worse
Some vaginal discharge after birth is expected. This discharge, called lochia, normally ranges from green to red or brown and can last anywhere from three weeks to eight weeks. Over time, it should progressively darken in color and decrease in amount.
The key warning signs are smell and volume. Normal lochia has a mild odor, but if it turns foul or putrid, that strongly suggests infection. Similarly, if the amount of discharge suddenly increases after it had been tapering off, something is wrong. Bright red bleeding that soaks through bedding or continues heavily beyond the first 24 hours is another red flag. A dog with pale gums, weakness, or lethargy alongside heavy bleeding may be hemorrhaging and needs emergency care immediately.
Signs of Uterine Infection
Metritis, an infection of the uterus, is one of the most dangerous postpartum complications. It typically develops within the first week after delivery, especially if labor was prolonged or difficult, or if a placenta was retained. The warning signs go well beyond abnormal discharge. Watch for:
- Fever or feeling unusually hot to the touch
- Lethargy beyond the normal tiredness of new motherhood
- Loss of appetite or vomiting
- Decreased or absent milk production
- Foul-smelling vaginal discharge
- Reduced interest in the puppies
A mother dog who delivered normally will usually eat within several hours and stay attentive to her litter. If she’s ignoring her puppies, refusing food, and seems “off,” don’t wait to see if it resolves on its own.
Retained Placenta or Fetus
Each puppy should be followed by a placenta, though they don’t always come out immediately after each pup. A retained placenta is more common in toy breeds and after prolonged or difficult deliveries. The telltale sign is greenish-black discharge that persists beyond 24 to 26 hours after the last puppy was born. By 48 hours postpartum, the discharge should have shifted to a rust color. If it hasn’t, tissue may still be trapped inside the uterus, creating a setup for serious infection.
In rare cases, a puppy can also be retained. If your dog seemed to stop labor but still appears restless, continues straining, or her abdomen still looks unusually large, a veterinarian can confirm with an X-ray whether another puppy remains. This is why many breeders recommend a postpartum vet visit within the first day or two.
Tremors, Stiffness, and Seizures
Eclampsia, sometimes called milk fever, happens when a nursing dog’s blood calcium drops dangerously low. It’s most common in small-breed dogs during the first four weeks after birth, when the calcium demands of producing milk are at their peak. This condition can kill quickly if untreated.
The signs often start subtly. You might notice mild trembling, muscle twitching, or a stiff and uncoordinated walk. Your dog may seem restless, disoriented, or anxious for no obvious reason. Without treatment, these early signs progress to full-body tremors, rigid muscles, seizures, coma, and death. The progression can happen over just a few hours. If you notice even mild trembling or a wobbly gait in a nursing dog, treat it as urgent.
Swollen or Discolored Mammary Glands
Mastitis is a bacterial infection of one or more mammary glands. The affected glands become firm, swollen, painful, and warm to the touch. The skin over the gland may look red or bruised. When you express milk from an infected gland, it may look normal, but it can also appear blood-tinged or contain pus.
A dog with mastitis often flinches or snaps when puppies try to nurse on the affected side. She may develop a fever and lose her appetite. Mastitis matters not only for the mother’s health but also for the puppies, since infected milk can make them sick or cause them to stop nursing altogether.
Behavioral Red Flags
Normal maternal behavior includes staying close to the litter, nursing willingly, and licking the puppies to keep them clean and stimulate elimination. Some first-time mothers are a bit clumsy or anxious at first, but they generally settle into a routine within the first day.
True behavioral red flags include outright rejection of the puppies, where the mother consistently pushes them away or refuses to let them nurse. Aggression toward the litter is rare but serious. Some dogs also show extreme restlessness, pacing, panting heavily, and seeming unable to settle even when the puppies are calm. These behaviors can signal pain, infection, eclampsia, or other complications that need veterinary evaluation. A mother who was attentive and suddenly becomes disinterested in her puppies is often telling you she feels very unwell.
Warning Signs in the Puppies
Sometimes the clearest indication that something is wrong with the mother shows up in her puppies first. Fading puppy syndrome describes newborns who fail to thrive in the first two weeks of life. The signs include poor nursing, persistent restless crying that isn’t soothed by feeding, failure to gain weight, and body temperature that’s too high or too low.
When multiple puppies in a litter show these signs simultaneously, the problem often traces back to the mother. She may not be producing enough milk, her milk may be affected by mastitis, or she may be too sick to nurse effectively. Weighing puppies daily with a kitchen scale is one of the simplest ways to catch problems early. Healthy newborn puppies should gain weight steadily every day.
Timing Matters
Different complications tend to appear at different times, and knowing the rough timeline helps you stay vigilant during the highest-risk windows. Retained placenta and heavy hemorrhage are concerns in the first 24 to 48 hours. Metritis typically shows up within the first week. Mastitis can develop at any point during nursing but often appears in the first few weeks. Eclampsia peaks during the first four weeks postpartum, when milk production is heaviest, though it has been reported as late as nine weeks after birth.
The bottom line is that the entire nursing period carries some risk, but the first two weeks demand the closest attention. Any combination of fever, foul discharge, refusal to eat, trembling, pale gums, or disinterest in the puppies warrants a call to your vet rather than a wait-and-see approach.