You can use unscented baby wipes, then a dry cloth. Or you can use witch hazel, gold bond powder to dry folds. Don't "puff" the powder-you don't want it in his eyes, or lungs. There is also something called duoxo pads. Many bulldogs are sensitive to foods. Check out the food articles on EBN. If he is doing well on what you feed, I wouldn't mess with it, because it may cause upsets. I feed mine, Taste of the Wild, which is grain-free, as my Frenchie has allergies to the grain-so they all eat it. There are others on here, who will certainly have more suggestions.