PhD Maria Tereza Terra-Long (North America Technical Services Manager - Poultry, Phileo by Lesaffre) points out how yeast probiotics help the chickens grow bigger and perform better and also support poultry microbiota
@dan hofer As long as full fat soybeans are properly heat-treated, there should be no difference between them when balanced for different macronutrients content. And it shouldn’t be too much different than using SBM plus oil. Actisaf would not be expected to work differently because of different soy protein source.