Poor Charlie 
Gracie had chronic dry skin and I found this product didn't trigger any additional scratching:
But if it got really bad, I'd probably eliminate all commercial products my dog could come in contact with (including ones in our home, such as floor cleaners, fabric softeners, etc.) and just use water for bathing and small doses of fish oil to moisturize from the inside.
Really hoping you both get some relief soon! Have you tried limiting food to a single ingredient for a week?
Gracie had chronic dry skin and I found this product didn't trigger any additional scratching:
But if it got really bad, I'd probably eliminate all commercial products my dog could come in contact with (including ones in our home, such as floor cleaners, fabric softeners, etc.) and just use water for bathing and small doses of fish oil to moisturize from the inside.
Really hoping you both get some relief soon! Have you tried limiting food to a single ingredient for a week?