I've never tried it on blood or poop, but I've used Shout Advanced with a lot of success. Its meant for stains that did not come out after washing and drying your clothes. Spray a lot of in on the stain and leave it for a few hours, then wash as usual. I've used it on stains from cooking oils and tomato-based foods and it always does the trick.
Katie, 30. Chicago 'burbs.
DX: Pancolitis as of 9/08 (Proctitis as of 1/08)
Current Treament: Asacol 400 MG 2X daily, Iron 325 MG 2X daily, Zoloft 50 MG daily, Multivitamin.
Diet: Spinach/sunflower and low-residue.
Previous Treatment: Canasa suppositories, Cortifoam, Prednisone, Colazal, Symex DuoTabs, Rowasa, Bentyl, Cortenema.
Status: Near total remission