Under normal conditions, the cow's true stomach is on the right side of the abdominal cavity, and the left side is close to the rumen. However, due to some internal or external causes, the normal position of the true stomach is mutated, either under the rumen or left of the rumen. Side, can cause cows to lose appetite, digestive disorders, abnormal bowel movements, rumen gas, abdominal pain and other symptoms, which is the real stomach shift. Actual gastric shift in cows usually occurs before and after 4 to 5 births. It is related to nutritional deficiencies before delivery, changes in the body position of cows, and other factors. Under the combined effects of these factors, the gastrointestinal activity is reduced, the function of smooth muscles is disordered, and the rumen is empty, resulting in changes in the normal position of the true stomach. The incidence of four-stomach displacement in high-producing dairy cows is generally 3%. The clinical symptoms of cattle disease often appear intermittent anorexia, and some antifeedant concentrates, still able to eat a small amount of silage and hay. Weight loss, mental depression, body temperature, breathing, and pulse are nearly normal, but lactation performance is decreased, defecation is less and harder, surface is accompanied by mucus, some diseased cows have diarrhea, and feces is soft and mushy. As the rumen is squeezed inside, a flat bulge appears in the left abdominal wall. The peristalsis of the rumen weakened, and the number of peristalsis decreased or even disappeared. The diseased cattle are progressively debilitating, preferring to lying and reluctant to walk, often taking lying posture. From the left side of the medullary canal to the back of the elbow, you can even hear the audible sound and the dripping sound from the abdomen. A combination of palpation and auscultation can hear metallic reverberations (pipe sounds) in the penultimate and third intercostals on the left side. Preventive measures to effectively ensure the total dry matter quality of feed for dairy cows, the proportion of roughage not less than 40%, and to ensure the "roughness" of roughage, to prevent smashing too fine, but not to make granules; control milk intake of dairy cows in the late period of dry milk The amount must not exceed 0.4% to 0.5% of dry matter, or 53 grams per day, or 200 grams of anionic salt to dairy cows to reduce the occurrence of hypocalcemia and milk fever; from dry period to delivery, The increase of concentrates and conversion of diets should not be too fast. Generally, there must be a transition period of 7 to 10 days. In the summer, it is necessary to do a good job of preventing the cows from cooling and prevent the adverse effects of heat stress on dairy cows: regular observation of cattle health and Feeding, ruminating, measuring bovine body temperature, respiration, and pulse; watching defecation, urinating, treating infectious diseases as soon as possible, and promptly treating them; ensuring that cows have adequate access to food and drinking water and preventing overcrowding. At the same time, the hygiene of cattle troughs, cattle beds, sinks, and sports fields are often maintained to ensure that the cows have good conditions for eating, drinking, and ruminating. N95 Face Mask Online,Kn95 Approved Face Mask,Kn95 Approved Mask,Kn95 Respirator Mask Guangdong Jia Mei Biological Technology Co.Ltd , https://www.jaymeimask.com