Ducklings enter their growth phase at 30 days old, which is the most critical period for development. During this time, they grow rapidly and show visible signs such as hardening of the wing feathers, full abdominal plumage, long body feathers, and fully developed tail feathers. By 80 to 90 days of age, the ducks—commonly known as Kam Yu-Chang—begin to lose their appetite and their growth rate slows down. At around 80 days, their size and weight become similar to that of adult ducks, but further weight gain becomes less pronounced.
Wild mallards are naturally aquatic birds, often seen in water bodies and feeding on wild plants and small animals. It's best to use a small pond or shallow water area as an active space to control their movement and make management easier. Like domestic ducks, they can be fed on Lake Tong and Wanzhou, spend the day in natural wetlands, and return to shelters at night. When raising them, it’s important to provide balanced commercial feed along with chopped vegetables to ensure proper vitamin intake. Daily feed amounts should be approximately 5% of their body weight.
After 80 days, they are usually raised in large net enclosures with simple shelters and play areas to prevent escape. The main diet includes barley, wheat, broken rice, bran, corn, root vegetables, and animal by-products. Green materials should be added in moderation to support healthy growth and improve meat quality. After each meal, provide plenty of clean water and allow the ducks to bathe for about five minutes, then let them rest quietly to aid in fattening.
Rearing wild ducks produces a lot of waste, so daily cleaning of the duck house is essential to keep the environment hygienic. Bedding should be changed regularly, and the shelter must remain well-ventilated. However, wire mesh should be installed outside windows to prevent predators and escape.
Under optimal feeding conditions, wild ducks grow quickly and begin to accumulate fat after two months. This leads to increased activity and the urge to fly, commonly referred to as "noisy." To delay this behavior, save feed, promote early feather development, and improve feed-to-meat conversion, a controlled feeding strategy is recommended between 40 and 60 days of age. Increasing feed by 15–20% during this period helps enhance growth and economic returns.
By 80 days, the ducks have developed full feathers and are ready for export. However, it's important to note that wild ducks should not be sold based on feather quality alone, as excessive energy may be used for feather growth rather than muscle development, leading to lower body weight.
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