(Chr. Hansen) Probios Soft Chews with Prebiotics contain a source of live (viable) naturally-occurring microorganisms to help dogs maintain a healthy digestive system. In addition to probiotics, Probios Soft Chews contain prebiotics which provide a complex carbohydrate food source to fuel the probiotics. Probios Soft Chews are beneficial during times of digestive disturbance, stress and travel or after antibiotic therapy and deworming. Tasty liver flavor.