Purina | Flock Raiser Crumbles Poultry Feed | 50 Pound (50 LB) BagBrand: Purina Features: Prebiotics and probiotics Supports immune and digestive health Essential amino acids Enhanced with lysine and methionine to support muscle and skeletal development 20% protein Increased protein supports quick growth, feather regrowth, and flock maintenance Vitamins A, B, D, E and K Help chicks grow into healthy adult birds Niacin Guaranteed niacin levels required for ducklings Quality ingredients used Suitable to be used for