Flock Block Whole grain enrichment supplement for chickens, other poultry and game birds. Encourages natural pecking instincts and contains oyster shell and grit. Provides optimum nutrition for healthy meat birds and mixed poultry flocks. Available in a 25# block. Contains oyster shell and grit – Supports shell quality and digestion Encourages natural pecking instincts – Keeps birds busy Supplemental nutrition for free-ranging birds – Supports complete nutrition