Technical content Dairy cows can avoid injuries caused by fighting between cows, especially cows that are not followed in the breast area. Cows that are horned are quiet and easy to manage. The area required for cow beds and shades after corner removal is small. Especially for cattle raised in bulk and fed in groups, dehorning is more important. Cows must be chased off at a young age, usually within 1 week of the cow’s birth, and no later than two months. Because cows are chased at a young age, cows are easy to control, less bloody, less painful, and less susceptible to bacterial infections. There are many ways to dehorn cows, usually by using electric iron chamfering or smearing with potassium hydroxide. Using electric iron to dehorn: The electric iron used for dehorning cows is specially made. Its top is cup-shaped and its size is the same as the bottom of the yak horn. After the electricity is heated, the temperature of the parts of the soldering iron is the same, and there is no phenomenon of overheating or overcooling. When used, place the top of the soldering iron on the yak horn for 15-20 seconds. Cows do not bleed when dehorning with electric iron. They can be carried out in any season of the year. However, this method is only suitable for calves within 35 days of age. Caustic Potassium Dehorning: Caustic potash (potassium hydroxide) is best for dehorning cows. This medicine is available in chemical stores. It needs to be stick-shaped and some medical petrolatum must be prepared. The following steps can be performed to remove the corners: First, cut off the corner base and the surrounding hair. Second, apply Vaseline around the base of the yak horn to prevent the applied caustic potash solution from flowing into the eyes. Third, use caustic pots (hands must be wrapped in cloth or paper to prevent burns) smear and rub at the base of yak horns until bleeding. This is done to destroy the growing point of the horn, so it must be done carefully. If the application is not complete, some of the keratinocytes will not be destroyed and the horn will still grow. Using caustic potash to dehorn cows must be done within 3-20 days of calf. Yak using this method to dehorn, in the early dehorning phase must be isolated from other yak, while avoiding the rain, or parts of the caustic potash washed by the rain, the caustic potash liquid will flow to the eyes and Face, causing damage to yaks.