I take my yorkies to a holistic vet - and Bubba has had problems - this is what he prescribed - it is wonderful shampoo - it is Photoclens by Ayuvet from Tomer Labs - you can buy it directly from them
natural herbal treatment - tomer laboratories - natural quality herbal remedies -- this shampoo is wonderful - the dogs smell wonderful & their coats are beautiful.
Here is what I found about the ingredients
oils of Himalayan cedarwood
Cedarwood Himalayan Essential Oil, Cedarus Deodora
Eucalyptus leaf oil
Eucalyptus Essential Oil, Eucalyptus globulus
Also, Eucalyptus is suppose to deter fleas
The other choice would be to go with a high grade oatmeal or high grade ingredients shampoo & conditioner.
These are all great for skin issues and will help improve the coat Nu Sal-T shampoo
NEW! Nu-Sal-T Shampoo (12 fl. oz)
or this one Relief
New! Relief SHAMPOO (12 oz) by DVM Pharmaceuticals
and Relief Creme
Relief Creme Rinse 12oz