I have 5 dogs and the 3 males mark their territory.  I have tried a dozen products and hands down this is the best at eliminating urine, blood and vomit stains on carpet and furniture.  Because of this great product, my home doesn't smell like five dogs live in it. Just wish it could remove burnt popcorn smell! Seriously.  I wish it was less expensive but there isn't anything out there that I have found that is so easy to use and works so well.  Just be careful not to let the dogs walk on the area.