1, calf is calcium deficient.
One is congenital calcium deficiency, that is, calcium deficiency after birth is mainly due to insufficient calcium intake of dairy cows during pregnancy or imbalance of calcium and phosphorus ratio; The other is acquired calcium deficiency, that is, it is normal at birth, but due to the insufficient calcium content in food (mainly breast milk), the calcium deficiency of calves will become more and more serious day by day.
Treatment: You can artificially feed some calcium tablets, and dairy cows must feed more soybean meal during lactation.
2. Calves lack selenium.
Selenium deficiency in calves can cause "myopathy", which usually occurs after 30 days of age. The calf looks normal but can't stand.
Treatment: Calves with selenium deficiency can be injected with sodium selenite and vitamin E injection.
3. The calf is weak or premature.
Extensive feeding management, poor feed quality, less exercise and poor physique of pregnant cows will all lead to calf weakness or premature birth, which will lead to inability to stand.
Treatment: Pay attention to nursing, carry out manual nursing regularly, put it on warm, clean and soft mat grass, and feed cod liver oil 10~20 ml every day. Generally, after 5~ 10 days of careful nursing, you can stand on your own feet.
Physiological characteristics of calves:
After the calf was born, it changed from a fetus to an independent individual, from the maternal supply of nutrition to the initiative to obtain nutrition from the outside world. The digestive and respiratory organs replaced the umbilical cord and began to breathe, ingest food and adapt to various external conditions such as temperature and humidity with their own abilities. Great changes have taken place in the body. The physiological function of newborn calves has not been fully developed, and their thermoregulation ability is poor and their digestive function is weak.
At this time, the digestive organs of calves, especially the forestomach, have not yet developed, and abomasum is the only developed and functional stomach of newborn calves. During artificial lactation, milk is directly absorbed into abomasum through the reflection of esophageal groove, and food is digested by abomasum. If the milk is drunk too fast, it is likely to overflow into the stomach of the tumor net through the insufficiently sealed esophageal groove, causing abnormal fermentation or indigestion and affecting the normal development of calves.
In addition, the newborn calves have empty gastrointestinal tract, no normal secretory reflex, insufficient and inactive secretion of pepsin and chymosin, no mucus secretion on abomasum and intestinal wall, underdeveloped nervous system, poor skin protection function and weak tolerance to the outside world.
With the increase of calf's age, the development of the stomach and the digestive ability of the forestomach are improved with the reasonable intake of calf's open food and plant feed. After the rumen flora is gradually established, when the calf begins to ruminate, it shows that the rumen function is normal.