As large demand of meat, eggs, milk and aquatic product in our daily life, development of animal husbandry, aquaculture industry is necessary and was strongly encouraged to by government. Thus high quality animal feed is in large demand now.
Feed industry in Europe and the United States developed countries have more than 100 years of history, especially rapid development of feed culture technology in the past 30 years. In 1957, 42 days of broiler meat was only 0.5 kg of meat, and in 1991 the same 42 days of broiler chickens were able to grow 2 kg. While now, for broiler chickens hatching to the supply market only need within 40 days. This is the best explanation.So more and more farmers care for the quality of animal feed.