In the process of feeding ducks, vitamin A deficiency is a metabolic disease that is mainly caused by visual and behavioral impairments.
1. Incidence. Vitamin A deficiency is caused by multiple meat ducks, followed by both meat and eggs. Ducks are rare. Symptoms usually appear at 6 to 7 weeks of age in ducks, but there are symptoms at 1 week of age. The characteristic symptom of sick ducks is that the eyes flow out of milky exudate, the upper and lower eyelids are adhered by the exudates, and the conjunctiva is cloudy and opaque. In severe cases, a large chunk of white cheese-like material accumulates in the eye, and the cornea even softens and perforates, eventually causing blindness. The diseased ducks have stagnated, their spirits are weak, their bodies are thin, their walks are unstable, their feathers are loose, their yellow skin on the shin and calves disappear, their movements are weak, and their legs are paralyzed. Pigs with visual and motor impairments will die if they are not treated.
2. Control methods. Prevention is more important than treatment, and it is necessary to pay attention to the diversification of feedstuffs at ordinary times, and it is indispensable for green feed or poultry multidimensional factors. According to the season and feeding conditions, carrots and carrots were the best in winter and spring, followed by leguminous green leaves, such as alfalfa, clover, milk vetch, and broad bean seedlings. In the summer and autumn seasons, wild plants such as Vallisneria are the best, followed by green vegetables and pumpkins. Once a diseased duck suffering from vitamin A deficiency is found, a feed rich in vitamin A should be added to the diet as soon as possible, and the ratio of yellow corn can be increased in the compounded material, and the green feed is even more unstoppable. It must be noted that vitamin A is a fat-soluble and unstable substance that can easily be oxidized during feed processing, preparation, and storage. The higher the temperature, the more likely it is to fail. Therefore, it is necessary to prevent feed rancidity, fermentation, and production. heat.
Because simple vitamin A preparations are not easily available, they are generally fed with clear cod liver oil. For individual treatments, each duck was fed 2 ml each time; or vitamin AD capsules were given, each pill containing vitamin A3000 international unit and vitamin D300 international unit, and each duck fed 1 pill at a time, which was fed 3 times a day. Other vitamin A preparations include cod liver oil drops, milk white cod liver oil, and wheat essence cod liver oil. Although they may also be used, they are not economical. The group treated ducks with vitamin A deficiency and was treated with an intramuscular cleansing cod liver oil for emergency treatment. A young duck with a body weight of 250 g or more could be intramuscularly injected with 1 ml of the fish. Can also add cod liver oil 20 ml per kilogram of concentrate feed. Vitamin A can be rapidly absorbed in the body and symptoms of the diseased ducks will soon disappear.
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