Hi,
I tried Pet Botanics Oatmeal Shampoo for my cat, Danny and it's great! It's made for cats and dogs, so you can try it for your pup. It smells clean and fresh without being too perfumey and it didn't dry out his coat. Oatmeal is supposed to be very good for the skin, so it's great to prevent (or treat) itchy, dry skin and rashes.

Petco carries it for about 8 bucks.