It will be better if the colostrum is fermented.

Fermented colostrum contains high concentrations of lactobacillus and is easily digested and absorbed by calves. At the same time, the initial lactate level after fermentation is higher, which effectively inhibits the growth of various pathogenic microorganisms, reduces the incidence of calves, and can prevent digestive diseases. Moreover, the calf's absorption rate of colostrum can be increased, the feeding cost of calves can be reduced, and the economic benefit of raising cattle can be improved.

1. Production method of fermented colostrum. Firstly, the extruded colostrum is filtered with gauze, stored in a clean bucket and stored under natural temperature and naturally fermented. Stir twice a day. When the degree of lactate reached between 85 and 130 degrees T, it was observed by the naked eye that the color was yellowish, the smell was fragrant and slightly sour, the viscosity was increased when stirring, the upper part was flocculent, and the lower part was clear and transparent (whey). At this time, the production of fermented colostrum is completed and is ready for use.

2, feeding method and feeding amount. Before fermenting colostrum, fermented colostrum must be well-stirred, then add 1:1 or 1:2 ratio of warm water, so that the milk temperature is maintained at about 37 °C. In order to exercise the gastrointestinal function of yak, start the fifth day of feeding the fermented colostrum, and add appropriate mixed concentrate and high-quality hay every day. On the seventh day, cooked boiled porridge was added to fermented colostrum every day, three times a day, and the total amount was controlled at about 50 grams each time. From the 10th day onwards, the calf's feed concentrates and forages were formally trained, gradually increasing from little to large, and generally ending at 30 days of age. At this time, the total amount of mixed confections that calves consume each day is about 0.75 kg. Afterwards, the amount of mixed concentrates will increase with the weight of calves.

3, the preservation of fermented colostrum. If fermented colostrum can not be fed in a short period of time, it is best kept in a refrigerator or other refrigerated equipment. It is also possible to add 0.1% formaldehyde solution in a concentration of 37% in the fermented colostrum, and then stir and preserve it evenly. This method is simple, low-cost and can be stored for about 2 months.

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