Not only did I use it on pet stains, I also tried it on my 15-year-old car's carpet where there had been numerous spills -- tea, coffee, Coke -- over the years. It worked better than anything I've tried on that so far. I just did a spot as I ran out of formula but I will definitely be trying it on the whole area. It even took out some spots on car upholstery that had been left by the shoes of car thieves -- first thing I found that worked on that. Very handy and practical.