For Dogs and Cats. NaturVet Digestive Enzymes with Prebiotics & Probiotics contain a source of: • Alpha-Amylase which can hydrolyze starch • Alpha-Amylase which can hydrolyze starch • Protease which can hydrolyze proteins • Cellulase which can break down cellulose • Lipase which can hydrolyze triglycerides.Prebiotics (FOS) help to support your pet's naturally occurring beneficial bacteria. Probiotics contain a blend of live/viable naturally occurring microorganisms recommended to help support a healthy digestive tract and maintain a healthy immune system.