I just wanted to tell you my MPP story! I have been using it on dog stains for about a year. This week, I ordered two gallons. I have a room that housed cat boxes and that's about it. The cats are gone, and I knew I had a "small odor problem". I pulled the carpet up and it became a HUGE odor problem. We pulled up all the tack strip, pulled out all the staples, and treated the whole floor and about three inches of the wall with MPP. AMAZING. The odor was gone with one treatment. The guy doing most of the work is an experienced carpet installer and said, "This is the most vicious pet odor eliminator I've ever seen." We could see it working as it bubbled up and foamed on the floor. Amazing stuff and I can't say enough good things about it! Thanks! Jennifer