NutriSource 4 Lb. Senior & Weight Management Dry Cat Food. Dry cat food ideal for all life stages. Focused on supporting the gut microbiome with a proprietary blend of prebiotics, probiotics, trace minerals and selenium yeast. Features a gut-focused proprietary blend called Good4Life because these ingredients nourish the gut microbiome, building the ultimate foundation for a long and happy life. Scientifically formulated with carefully selected ingredients, and Good4Life to provide essential nutrients for optimum health and long life. Powerful prebiotic called BIO-MOS that supports the intestinal tract in removing harmful pathogenic bacteria while feeding gut flora for optimal digestion. Probiotic-coated kibble absorbs quickly and therefore colonize faster to aid in digestion