Tomlyn?s Pre & Probiotic Supplement for Dogs helps support balanced microbial flora and promotes intestinal health. Contains a source of live (viable) naturally occurring microorganisms. Advanced formula with over 8 billion CFUs of probiotics per packet to help support proper digestive and bowel health. Added prebiotics to support the growth of beneficial bacteria. Contains direct-fed microbial cultures to supply beneficial microorganisms that occur naturally in the hind gut of healthy animals. This water soluble, flavorless & easy to digest is a natural source of probiotics.