When we had the giant flea battle, we found out that Strider is allergic to fleas. They're mostly gone except for the ocassional ones that hop on him outside, but he's still picking at the sores from their bites. He needs a bath anyway, what kind of shampoo would be best to help him feel better? I'm a big fan of bio groom products, but didn't know if their medicated tar-sulfur kind would be appropriate, or if I should stick with colloidal oatmeal. Any thoughts? Recommendations?