I tried some Oatmeal shampoo from Petsmart and hated it. It made Ferdinand's skin more dry.
I bought some natural dog shampoo for dry skin at Sprouts a few weeks ago and love it. It's called Head to Tail Aloe Oatmeal Shampoo. I use it with the Mane and Tail Conditioner (but I rinse it out or it leaves Ferdinands fur nasty). The combination leaves his hair really shiny, soft, and smelling nice for a week. It's also helped with his dry skin.
Here's the link to the shampoo
http://www.onlynaturalpet.com/produc...oo/133024.aspx