Amy, my new mission in life (being so unemployed busy) is emailing companies about their products, no kidding. Maybe seltzer water will take out the stain? I don't know but it seems to work on a lot of stuff...the effervesece? I still have beef rawhide bone stains on our family room rug which are totally impossible to get off. I always put a towel down but Cody would move off it. Thank God greenies don't stain!