Forestomachal relaxation means that the excitability of forestomach nerves is reduced, contraction force is weakened, digestive function is reduced, food stays for too long and ferments and decomposes, toxic substances are produced, the microbial flora in the rumen is destroyed, digestive dysfunction is caused, and systemic dysfunction is accompanied. Cow B-ultrasound can be used to assist in the examination of the rumen condition of dairy cows to judge.

Sick cows are depressed, have decreased or no appetite, grind their teeth, ruminate slowly, and have reduced heating. The rumen peristalsis sound is weakened or disappeared, the rumen contents are soft or sticky, and sometimes there is mild rumen distension. The reticulum and omasum peristalsis sound is weakened or disappeared. The number of rumen peristalsis can be seen on cow B-ultrasound less. Sick cows have delayed feces excretion, the feces are hard and dark, and are black and peat-like, followed by diarrhea, excretion of brown porridge-like or watery loose feces, and the feces are foul-smelling. There is generally no obvious change in body temperature, pulse, and respiration, and the pulse increases in the later stage. When secondary rumen distension occurs, breathing is difficult; when secondary enteritis occurs, the body temperature rises.

Choose a scientific feeding management system. Daily feeding feed should be adjusted in a targeted manner according to the physiological characteristics of dairy cows at various developmental stages. It is strictly forbidden to blindly pursue high yields and unilaterally increase the concentrate content in the feed. The change of feeding feed at each stage should follow the principle of gradual progress. Do not suddenly change the feed composition and feeding shifts. In addition, no matter what feeding method is chosen, the feed nutrition must be guaranteed to be full price. Supplementing necessary green hay, vitamins and minerals and other nutrients can effectively prevent the occurrence of symptoms of forestomach retardation. Frequent use of cattle B-ultrasound to check the rumen condition of cattle is also one of the necessary tasks.

Strengthen feed supervision and replace it immediately when it is found to be moldy or rotten. Do a good job in feed preparation, remove sharp foreign objects in the forage in time to avoid traumatic diseases caused by accidental ingestion of dairy cows, and frequently use cattle B-ultrasound to check the condition of cattle. In addition, ensuring that dairy cows have enough exercise every day and strengthening their physical fitness can effectively prevent forestomach retardation.