Vet's Best Probiotic Soft Chews Dog Supplement, Supports Dog Digestive Health, Promotes a Healthy Gut, 90 Day SupplyDIGESTIVE SUPPORT: Vet's Best Probiotic Soft Chews for dogs is a veterinarian formulated once a day supplement that supports digestive health; Available in both a 30 or 90 day supply. HEALTHY GUT MICROBIOME: Each soft chew promotes a healthy, balanced digestive flora with 1. 5 Billion CFU with active cultures of 6 strains of bacteria, and patented technology to keep the chew stable until it reaches the digestive tract. INFUSED WITH OCEAN KELP: Ocean