Finally a product that really removes pet stains. I have used 3 or 4 other products among them organic or natural pet stain remover. Still I see yellow stains on the pale colored carpet. Our little Maltese is a rescue from a puppy mill through a Maltese and More Rescue group. They were wonderful to deal with. Our dog was 10 yrs old and from all she had been through by the time we got her she was incontinent. We tried for a couple of months taking her on frequent walks but still she peed on the carpet. We didn't scold her we just said No, and then gave her treats when she would go potty outside. I finally gave up and she in now in diapers. But the stains remained. So as a last ditch effort I bought Parker and Bailey pet stain remover. I was worried that it might effect our dog and two cats because there are no information as to the effect on animals. So I shampooed the carpet immediately after scrubbing the treated spots. It worked so well. The yellow stains are gone. I don't know how it works on dark carpets, but on my light carpet it worked.