Vetra Synbiotix Prebiotic / Probiotic 30gVetra Synbiotix (Prebiotic Probiotic) 30g Vetra Synbiotix is a combination of prebiotics and probiotics to rapidly colonize the gastrointestinal tract with beneficial bacteria for a variety of animals. Features: High density of direct fed microbials (DFMs) with Prebiotics to rapidly introduce and boost beneficial bacteria into the colon, especially during and after antibiotic therapy. DFMs are probiotics that can be fed directly to the animal.