Common prebiotics in pet food include chicory root (inulin), fructooligosaccharides (FOS), beet pulp, and psyllium husk. Unlike probiotics, which are live bacteria, prebiotics are the food source that helps good bacteria thrive and outcompete harmful organisms. Benefits include firmer stools, improved mineral absorption, and a stronger intestinal lining that resists pathogens. Prebiotics and probiotics work synergistically, a combination sometimes called synbiotics. Introducing prebiotics gradually prevents gas and bloating. Many premium pet foods include prebiotics, and supplemental forms are available for pets recovering from digestive upset or antibiotic therapy.