Somewhere between 200 CFU and nothing. That is the range where most Salmonella arguments in feed milling actually happen, and it is also the range where every control measure starts to look unreliable. A challenge trial recently put three commercial anti-Salmonella products against the same four-serovar cocktail in two real matrices, and the spread in outcomes was wide. Poultry feed treated with a formaldehyde product came back negative by most probable number. One hundred percent. Poultry feed treated with a formic acid product dropped from 6.4 to 0.1 MPN per gram, a 98.4 percent reduction. Dry dog food treated with a bacteriophage product did nothing measurable. Above 6.4 MPN per…