I looked for the product because I work with wild birds. I frequently get birds that need to be bathed after contact with oil or soot. (woodpeckers are notorious for going down chimneys.) After the cleansing bath/shower, using good soap, the natural oils that keep the birds' feathers waterproof is gone, and we have to either replace it or wait several weeks while the bird slowly works at preening, even then missing important areas, like the head and the back of the neck. This product works reall...