Probios Digestion Support with Probiotics Horse Treats are a lactose-free source of beneficial cultures that promote healthy digestion and total body health. They contain a source of live (viable) naturally occurring microorganisms to help horses with digestive upsets and diarrhea. Probios Digestion Support with Probiotics all-natural biscuits provide the goodness of yogurt to help maintain a healthy digestive tract. Made with grains, fruits, vegetables, and two beneficial bacteria. Feed 3 – 6 treats daily. Approximately 70 treats per bag.