Thanks for your resourceful information. Pet owners should take notice of any health issues in their puppies. Puppies are more sensitive to disease than adults. My friend had 3 puppies, but they were only 2 weeks old when he first noticed one scratching excessively and found red patches on its skin. They got infected with fleas after checking beds and other areas around the house, but it turns out their mother was the main cause. The mother had fleas too, which is why I believe it's important to check all your dogs surroundings including your mother dog for these pests as well as treating them immediately to avoid incurring any further costs or medical treatments for your dog. With proper dog flea treatment, his puppies are in good condition now.