I am a lifelong cat owner but in the last 20 years I've had two Maine Coon cats that refused to pee in the cat box (and there are several to chose from), apparently finding the carpet behind my reclining chair in the living room more preferable. This was making my living room unusable due to the horrid and embarrassing smell. I thought I had tried every product available to rid house of this nightmare. But, when I found this product on face book, read the many many reviews and out of desperation, I ordered two bottles. If this didn't work, my only other option was to remove the carpet and right now I'm not able to replace it. The product arrived in a few days and I immediately sprayed the worst area thoroughly. Almost immediately, there was significant improvement in the air quality in the living room. After just a couple more treatments, there is no longer any odor and I'm ecstatic with the results. I can't thank you enough for this product and I will recommend My Pet Peed to everyone I know that has pets. Too bad you don't make a product that would work in horse stalls, that would be amazing.