"Fallen eggs" in ducks refer to a condition where female ducks, raised during spring and entering their egg-laying period from November, experience a sudden drop in egg production. This typically occurs as the weather cools down, leading to large temperature fluctuations between day and night, or due to nutritional deficiencies. As a result, these ducks may stop laying eggs altogether. If ducks "fall their eggs," they will begin to molt, and it will take until the following spring for them to resume egg production.
Controlling this "falling eggs" phenomenon can significantly extend the egg-laying period and improve the economic returns of duck farming. When individual ducks start producing smaller eggs with thinner shells, delay in egg-laying, or show wet feathers on their bodies, it's a sign that the "falling eggs" syndrome is occurring. Immediate action must be taken to address this issue.
First, adjust the duck group by removing older, weak, sick, or disabled ducks, and keep only those with good egg-laying performance and strong health. It's also beneficial to add more ducks to the group so they can interact and increase overall activity levels.
Feed management is crucial. Increase the protein content in the feed by adding more corn, broad beans, and soybean cakes, while controlling the total feed intake and increasing the nutrient density of the diet.
Ensure the duck house is properly insulated by plugging any holes, hanging straw curtains on doors and windows, and laying thick, dry bedding made of straw or hay on the floor to keep the ducks warm, especially around the abdomen. Also, focus on disease prevention and maintain good hygiene to ensure the ducks remain healthy.
During the egg-laying period, ducks require 16 hours of light per day. In winter, when daylight is shorter, artificial lighting should be provided. Install 40- to 60-watt bulbs (one per 20 square meters) in the duck house, placed 2 meters above the ducks' backs and covered with lampshades to direct the light effectively. Light should be evenly distributed, and it's recommended to turn it on for 3 to 4 hours at night.
The practice of "catching the shed" helps improve the cold resistance and digestion of ducks, preventing them from stopping egg production. The method involves gently gathering the ducks in the shed and moving them in a circular motion in the same direction, completing about 4 to 5 laps. This should be done once every hour, two to three times a day. Especially before releasing the ducks, it's important to perform "catch sheds" first. When more than 80% of the ducks are vocal and active, they can be moved to open water to help them adapt to external temperatures and water conditions.
Adding cod liver oil can boost duck immunity and stabilize egg production. It is rich in vitamins A and D. The feeding method involves mixing 1 ml of cod liver oil with 1.5 kg of bran, then blending it into the feed. Feed this mixture for 3 to 5 days. If egg production returns to normal and the ducks have lighter feathers, stop the treatment, as continued use may reduce economic efficiency.
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