Thanks for posting that link to DermaBenSs Shampoo. I read their description and it does sound like a good product.  I wonder if anyone here has experience using it?

"DermaBenSs^™ Shampoo is formulated for dogs, cats, and horses. It is a gentle, soap-free, antiseborrheic, antimicrobial shampoo. It is for support of healthy skin for animals with seborrheic skin conditions. Great for degreasing and follicular flushing. Ceramides aid in moisturizing, repairing, and restoring dry, damaged skin.

Formerly known as DermaBenSS At 2.5%, this formulation is stabilized (and given additional nutritional value) by the worlds best natural antioxidant, Vitamin E. It is the only BP product on the market to contain both sulfur and salicylic acid in an all natural base containing a natural, herbal fragrance and moisturizers. It assists in the treatment of Hot Spots, pyodermas (skin infections), lick granulomas, acne, oily seborrhea, greasy skin, Staph infections, skin fold infections and many other diseases requiring an antimicrobial shampoo. It stands alone in its ability to flush out hair follicles filled with infectious microbes."

@mastini-mayhem - thanks for the tip on Epsom Salt.  Any particular procedure for mixing (amount, warm or cold water, how long to soak etc..)