The objective of this test was to compare various drying powders for their efficacy with regard to inhibiting bacterial growth. Heat mats were swabbed in an inhabited piglet farrowing room. Samples were cultured on nutrient agar. After incubating for 48 hours there was substantial growth. Typing revealed that Strep, Staph, and E.Coli were all present. Bacteria colonies were homogenized and used to seed more culture plates. Culture plates were divided into quarters and applied three treatments per plate, leaving one quarter untreated as a control. The treatments consisted of 100 mg disks of each drying powder applied to the center of the quartered, seeded section of culture plate. Plates were incubated at 35°C and observed and documented bacterial growth of each treated area.