I went looking for the Vircon-S disinfectant recommended by threehorses. No one had it. My local feed store called their sales rep who also sells to Purina for their poultry operations. He said Purina uses Advantage 256 for cleaning and disinfecting in the poultry operation. He arranged to have a gallon bottle sent to my feed store. (Cost $31.00) I am on my way to pick it up right now. I am going to clean and disinfect anything that isn't moving out back. Here's some info: Advantage 256 - 21% triple "true" phenolic cleaner-disinfectant-deodorant effective in 10% organic challenge and 1000 ppm hard water. At a dilution of 1:256, Advantage 256 is staphlocidal, pseudomonacidal, bactericidal, fungicidal, tuberculocidal, and virucidal. Advantage 256 is recommended for use in poultry and turkey hatcheries, breeder/growing houses, ratite facilities, swine producing facilities, equine facilities, veal barns, cattle raising facilities, animal care facilities, hospitals, and health care institutions.