Fading puppy syndrome is a common condition that causes newborn puppies to die within the first few weeks of their life. While there's little you can do to prevent fading puppy syndrome, you can improve your pup's chances of survival by monitoring their body weight and health during the first few weeks. Watch out for any unusual symptoms, such as low birth weight, diarrhea, vomiting, salivation, and incessant crying. If your newborn pup exhibits any of these symptoms, it's important to consult your vet right away.