Fading Puppy Syndrome (Failure to thrive) in Dogs

The syndrome has many potential causes, but often the cause of the demise is unknown
Congenital abnormalities are the cause of nearly half of all neonatal deaths and may not be immediately apparent
Other potential causes include maternal issues, infectious causes, and environmental causes
Symptoms vary widely, and may be subtle
In general, fading puppies are cold to the touch, weak, and may not be able to suckle properly
Diagnosis is usually postmortem and most often by necropsy (autopsy)
Puppies often die before any specific treatment can be initiated
If symptoms are noticed in time, supportive care such as hydration, rewarming, bottle feeding, and antibiotics may be effective

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A closer look: Fading Puppy Syndrome (Failure to thrive) in Dogs

Failure to thrive occurs when a puppy does not meet basic development milestones in the earliest days of life. Most often, this occurs so rapidly, there is no time to initiate medical treatment before the puppy dies. It is not always possible to determine the reason why an individual puppy succumbed to fading puppy syndrome, but in general cases can be categorized as related to maternal issues, environmental factors, congenital abnormalities (aka birth defects), or infectious causes.

Fading puppies may be described as showing:

Excessive crying compared to littermates
Staying separated from littermates
Low body temperature
Limpness when picked up

Other symptoms stem from common conditions associated with puppies with failure to thrive, particularly dehydration and hypoglycemia (low blood sugar).

Risk factors

Fading puppy syndrome is fairly common, and generally has a poor prognosis, especially in puppies within their first week of life. Whenever any puppy seems sick, prompt veterinary care is ideal. If a puppy dies, necropsy (autopsy) findings may help to prevent other puppies from dying of the same underlying cause.

Possible causes

Causes associated with maternal issues include:

Lack of adequate care from the mother
Lack of milk production or poor-quality milk
Malnutrition/improper nutrition: homemade raw diets in particular have been associated with higher rates of failure to thrive and neonatal sepsis
Age of mother (too young or too old)
Cannibalism
Mastitis (infection of the mammary glands)
Poor maternal health, including underlying illness
Parasites
Injuries during pregnancy
Dystocia (difficulty giving birth)

Causes associated with environmental factors include:

Unsanitary conditions
Extreme temperatures

Congenital abnormalities in puppies may not be immediately apparent, but they may lead to failure to thrive.

Congenital abnormalities include

Cleft Palate or Lip in Dogs

Hydrocephalus

Congenital Kidney Disease in Dogs

Congenital heart defects

Infectious causes include

Parvovirus in Dogs Distemper in Dogs Roundworms in Dogs Hookworms in Dogs Toxic Shock (Sepsis, Septicemia and Bacteremia) in Dogs Parasitic Diarrhea (Giardiasis) in Dogs Valley Fever (Coccidioidomycosis) in Dogs

Canine adenovirus

Main symptoms

Signs and their severity vary depending on the underlying cause.

Examples of symptoms may include

Weakness in Dogs Bloating (Abdominal Distension) in Dogs Diarrhea in Dogs Blue (Cyanotic) Gums in Dogs Difficulty Breathing (Dyspnea) in Dogs Rapid Breathing (Tachypnea) in Dogs Red or Spotted Gums (Petechiae or Ecchymosis) in Dogs Yellow Eyes or Skin (Jaundice) in Dogs Blood in Urine (Hematuria/Hemoglobinuria/Myoglobinuria) In Dogs Eye Discharge (Epiphora) in Dogs Nasal Discharge in Dogs Sneezing in Dogs

Low body temperature

Difficulty nursing

Poor weight gain

Other more specific symptoms may be easy to recognize such as an enlarged, round head (from hydrocephalus), or a physical defect in the lip, nose, soft and/or hard palate (from the presence of congenital abnormality cleft palate).

Testing and diagnosis

If a puppy is presented for treatment with suspected failure to thrive, supportive therapy is initiated immediately, prior to any diagnostics. If there is an identifiable underlying cause, this may be determined by bloodwork, urinalysis, and diagnostic imaging once the puppy is stabilized.

Steps to Recovery

Treatment is supportive (such as warming, hydrating, supplemental feeding, and ensuring a clean environment) or may be more specific (such as antibiotics, antiparasitic medications, or in the case of some congenital defects, humane euthanasia) if an underlying cause is identified.

If an underlying cause can be identified and treated in time, puppies may make a full recovery, though some may have lifelong health problems. Often, puppies die before an underlying cause is identified, and/or before treatment is initiated. The outcome is highly dependent on the underlying cause and response to treatment. The prognosis is poor, and grave in puppies less than a week of age.

Prevention

Many puppies with failure to thrive have underlying congenital conditions. Screening breeding animals for genetic conditions is an important preventive measure.

Fading puppy syndrome can also be caused by contagious or infectious diseases. Transmission may be prevented by appropriate vaccination, regular vet care including deworming, and good hygiene practices for breeding animals. Monitoring maternal health and fitness for and during pregnancy also helps maximize outcomes.