Supplements You Can Trust From gastrointestinal and immune health to anxious behaviors, find trusted support for your pet with Purina Pro Plan Veterinary Supplements. Trusted by veterinarians, every supplement is backed by research, including probiotic supplements that represent Purina's leadership in the field of microbiome research. Easy to Administer Each supplement was designed to be not only effective, but easy to give your pet—through powder sachets or chewable tablets. Made by Experts The science behind these supplements represents a collaboration among a network of scientists, including veterinarians and nutritionists. Exceptional Quality In a typical shift, Purina conducts 400+ quality checks involving ingredient & packaging, receiving, processing and packing. Responsible Sourcing Each ingredient can be traced back to its trusted supplier. They're not just monitored at factories—quality is evaluated from the source.