Which of these would not apply to direct-fed microbials (DFMs)?
- Live, naturally occurring microorganisms
- Part of the normal flora of the GI tract
- Used to provide microbial balance in the digestive tract
- Non-viable, synthetic feed additives
In the US, Association of American Feed Control Officials (AAFCO) and the FDA recognize a list of microorganisms appropriate for animal feeds. Direct-fed microbials have been long been utilized for a variety of animal health and production purposes. The term probiotic is often used interchangeably with DFM.