Animal Health Solutions - Hen Boost Probiotics, Help Boost Immunity and Hydration in Full Grown Chickens (8 oz) Multiple benefits: This product is a blend of micro-encapsulated Probiotics, vitamins, electrolytes and enzyme for fowl. Immunity boost: providing hen boost everyday in fresh, clean, cool water helps maintain a normal intestinal microflora by competitive exclusion and antagonism. The Probiotics also help stimulate the immune system. Digestive aid: the addition of enzymes help improve feed intake and digestion. Birds stay hydrated: vitamins and electrolytes help balance nutritional needs, and help keep the bird hydrated. Probiotics that hit the target: encapsulation protects the beneficial probiotics by creating a physical barrier which dissolves at its target point, The gut. Our Probiotics are proven to survive the acid in the stomach and flourish in the hind gut.