It truly works on my white maltese female dog. The red tear stains under her eyes spoiled her beautiful face and I tried different suggested remedies and none helped the situation. Used as directed Angel Eyes works like a charm. Be patient and as I said follow the directions and as the stained hair grows the stains will soon be gone. She's sooooo pretty now that stains are gone! I continue to put in her food although the dose becomes smaller and less times a week as you use it. She loves the beef although that's the only one I tried. I sprinkle it on her dry food and stir some very warm water in to disolve the powder and it makes a gravy. Also this way she gets it all and none left on the bottom on her bowl. I RECOMMEND THIS PRODUCT HIGHLY!!!!!!!!!!!Ann