Dog urine odour is unmistakable, strong, and extremely difficult to permanently remove. Like many other animals, dogs use urine and feces as a method of communication, indicating possessiveness and territoriality. Urine Off is the #1 Veterinarian recommended product for dog urine odor and stain removal. In the past, dog urine odour and stains were nearly impossible to eliminate. Now, with Urine Off Dog & Puppy Formula, you can permanently eliminate your dog's urine odor and stains from virtually any surface. How does it work? Urine Off uses a combination of naturally occurring micro-organisms and their enzymes to digest the uric acid crystals (which produce urine's pungent aroma) as well as urea (the sticky substance in urine) and proteins (which promote pathogen growth).