Based on the biological characteristics and growth patterns of black phoenix chickens, they can be classified as broilers from 7 to 25 weeks of age.
At around 6 weeks old, black chickens begin to replace their feathers with fine downy feathers, which have poor insulating properties. By about 9 weeks, their thermoregulation abilities improve significantly. At this stage, the temperature in the chicken house should be gradually reduced, allowing daytime warmth while still providing nighttime heating.
Before entering the rearing house, it's essential to thoroughly disinfect the facility, feeding equipment, and waterers. Prepare feed, bedding, and necessary medications. Organize labor to sort the chickens into groups based on size, health, and sex, ensuring proper separation of strong and weak individuals.
This period is critical for bone and muscle development. To support healthy growth, provide ample space for movement and encourage physical activity. Under a flat-raising system, the stocking densities are recommended at 15 birds per square meter for 9–13 weeks, 10 per square meter for 14–17 weeks, and 7 per square meter for 18–25 weeks.
Light exposure during the rearing phase should be carefully controlled, typically between 8 to 10 hours daily. This helps regulate their biological rhythms and supports overall development.
Feed restriction plays a key role in managing weight, which directly affects future egg production. During this time, reduce energy and protein levels in the diet while increasing the proportion of bran and green feed to lower concentrate intake. Ensure enough feeders are available, and feed quickly so that every chicken gets its share. Regular weighing is crucial—targeting 750g at 90 days, 900g at 120 days, 1100g at 150 days, and 1250g by 180 days. Weigh every 10% every two weeks, adjusting feeding amounts accordingly. If weights fall below standards, increase feed; otherwise, reduce the number of feedings.
Maintaining a clean and quiet environment inside and outside the housing area is also vital for the well-being of the chickens. A calm, hygienic setting reduces stress and promotes better growth and health.
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