Step 1: Understanding commercial hatcheries.
Commercial hatcheries are specialized units where fertilized eggs are incubated under controlled conditions to hatch chicks.
Step 2: Poultry management practice.
For better survival, disease control, and vaccination schedules, chicks are supplied immediately after hatching.
Step 3: Reason for one-day-old chicks.
One-day-old chicks adapt easily to farm conditions and are economical for transport and management.
Step 4: Conclusion.
Hence, commercial hatcheries provide one-day-old chicks.