Which of the following husbandry practices is not carried out in pig farming?

The husbandry practice that is not carried out in pig farming is "shearing of hairs of the skin". This is because pigs have hair rather than wool, and hair does not need to be sheared like wool. In pig farming, castration of excess males is often carried out to prevent unwanted breeding and improve the quality of meat. Application of iron supplements is done to prevent anemia in piglets. Numbering by ear notching or tattooing is used for identification and record-keeping purposes. Dipping or spraying of animals is done to control external parasites and prevent the spread of diseases. Overall, each of these practices is aimed at improving the health and welfare of the pigs, as well as the quality of the meat they produce.