My English Bulldog puppy had such severe tear stains that it almost looked like rust was in his eye folds. I tried cleaning the stains with topical solutions which I used multiple times every day. Nothing worked. The stains were still terrible and very dark. I asked my vet if she had any suggestions and she said her mom was using Angel Eyes on her white lab and she was pleased with the results. I ordered it and almost 3 weeks later the stains were all gone! I am so happy with this product. I now give him a teaspoon every 2 days and it maintains the area stainfree!