NaturVet's Aller-911 Skin & Coat Shampoo is sulphate-free and formulated to be soothing for pets with seasonal allergies, the company reports. The shampoo cleans thoroughly, yet is mild enough for daily use without stripping the coat of essential natural oils; and routine bathing leaves the skin and coat soft, shiny and looking great, according to the manufacturer. Aloe vera extract, tea tree-, rosemary- and lavender oils also make it a very effective, natural deodorant, the company adds. The shampoo comes in a 16-oz. bottle.