Feed your backyard flock. Purina? Flock Raiser? Crumbles provide complete and balanced nutrition for healthy flocks and baby birds. Sustain an entire mixed flock of poultry, including starting and growing hens, roosters, ducks and geese Purina? Flock Raiser? Crumbles is also for turkeys, pheasants and quail 8 weeks of age and older.