You might want to look at two of our products, Derma-IonX and Defendex shampoo to help with your problem. Derma-IonX which is an oral homeopathic product stimulates the enzyme systems in the body which reduces itching and inflammation , promotes healing of the skin and helps with assimilation of nutritional components in diet and supplements. This is very important for your puppy. Demodex mange is not contagious, but Sarcoptes is. Strengthening the immune system is essential for someone with Demodex.
The supplements I use along with Derma-IonX include digestive enzymes, probiotics, vitamin C, MSM, and fish oil. Together with Derma-IonX it produces a synergistic effect for a faster response. It can also be used topically if there are troublesome spots on the skin. I would also suggest that you give your pets only filtered water for drinking and bathing if your water contains chlorine or fluoride. For the dietary modifications you might want to try a grain free diet for a while.
Defendex shampoo which was designed to fight against fleas and mites also washes away debris and soothes the skin. Using both products is a simple and effective way of helping resolve a difficult condition. If you have fleas in your house I prefer to treat the house to kill the fleas rather than allow all the fleas bite your dogs (if they have been given a topical flea product) in order to kill them.
Please feel free to contact us again if you have any other questions.