You can't just look at the color, but combined with your pig's growth stage and economic use, pigs can use concentrated compound feed at different stages. Usually, pigs are in the early stage of growth and bone growth. There are certain requirements for mineral requirements, but protein, vitamins and carbohydrates are essential.

中期时主要发育肌肉，对蛋白质的需求量很大，并要求各类氨基酸达到平衡，并注意维生素、矿物质等的补充。后期，主要是沉积脂肪，对碳水化合物要求适当。

In the middle stage, it mainly develops muscles and needs a large amount of protein, and requires all kinds of amino acids to reach balance, and pay attention to the supplement of vitamins and minerals. In the later stage, fat is mainly deposited, and carbohydrate is required appropriately.

不论猪在什么生长阶段，都要求饲喂相应的全价饲料，因为我们知道猪在不同阶段对营养物质的需求都不同。

No matter what growth stage, pigs are required to feed the corresponding full price feed, because we know that the demand for nutrients in different stages of pigs is different.

一个饲料的好劣并不取决于颜色，因了解其成份，再结合猪的生长阶段选择适宜的饲料。

A good or bad feed does not depend on the color, because we understand its composition, combined with the pig's growth stage to choose the appropriate feed.

黑色浓缩料可能是加了脂肪使颜色更光亮粉尘更少，黄色也许没加。总之从颜色方面分辨饲料不全对

Black concentrate may be added fat to make the color brighter, less dust, yellow may not be added. In a word, it is not correct to distinguish feed from color