The fattening period of adult beef cattle is generally 90 days, and that of calves is 120 days. At the beginning of fattening, you can feed a lot of hay and coarse grains, but only a small amount of distiller's grains to train their feeding ability and promote the gastrointestinal volume to become larger. After about 15 ~ 20 days, it gradually transited, distiller's grains increased and hay feed decreased. In the middle of fattening, the amount of distiller's grains can be greatly increased. The maximum daily feed for adult beef cattle can reach 40-50 kg, and that for young cattle is 20-25 kg. At the same time, a small amount of concentrate and other palatable feed should be reasonably matched to maintain its strong appetite. The hay should be short, and the distiller's grains should be mixed with the grass so that it can eat freely. When cows are 70% to 80% full, concentrate can be added to promote their satiety. Feed twice a day, drink water three times, and feed salt regularly, usually once every 7 ~ 10 day. Feed 50 ~ 60 grams of adult beef cattle and 40 ~ 50 grams of young cattle every day.
When fattening beef cattle with distiller's grains, we should pay attention to the following points: ① At first, dairy cows were not used to eating distiller's grains, so they needed training, giving less first and increasing gradually. If necessary, they can mix distiller's grains with a little salt and apply them on their mouths to make them adapt; ② Distiller's grains must be high-quality and fresh, and all stale, moldy and frozen grains are not allowed to be fed; ③ In the fattening process, if cows are found to have eczema, knee joint swelling, abdominal distension and other symptoms, they should stop feeding distiller's grains, adjust the feed appropriately and increase hay feed to adjust their digestive function.