If you are able administer early therapy then there is a chance that dog health can improve. Vets will recommend antibiotics that you will need to administer for 5 days at least so that it can delay the onset of any secondary infection caused by bacteria or virus. The best and effective therapy for fading puppy syndrome is an injection containing blood serum taken from a healthy puppy. The most important thing is to contact your vet immediately if you see any abnormal signs in your puppy.