(Biocare Animal Products) PuriShield Stall Guard is formulated to help kill bacteria and viruses in the same way as nature's own antimicrobial peptides. PuriShield has shown efficacy against E. coli, salmonella, staphylococci, streptococcus, EHV-1, and numerous other viruses. Combine the 8 oz. concentrate with 5 gallons of water for use in stalls, barns, dairy parlors, kennels, and other animal housing facilities. PuriShield Stall Guard can be safely applied to surfaces in the environment without the need to remove feed or animals.