Manna Pro Poultry Grit with Probiotics is a premium insoluble granite grit designed to support proper digestion in all classes of poultry including chickens, ducks, turkeys, and game birds. This essential supplement aids in the mechanical breakdown of whole grains and foraged materials by promoting effective gizzard function, improving nutrient absorption and overall gut efficiency. What sets this grit apart is the inclusion of probiotics, which help support a healthy digestive tract and balanced gut flora for improved immune response and reduced digestive stress. Sourced from all-natural granite and screened for ideal particle size, this poultry grit is appropriate for birds aged 8 weeks and older and is especially valuable for free-range flocks or those fed whole grains and treats.