As I am aware, in general cattle should graze on the meadows, feed on grass and hay, although in reality, the animals are fed with starch-containing grains instead, mainly corn, to increase growth rate and produce tenderer meat. This causes the failure of one of the four chambers in the cattle stomach, which causes indigestion, thus the need for a solution = cutting a permanent open hole/flesh/wound on an animal that you will eventually consume.

This also increases the chances of pathogenic E.coli bacteria formation in the cattle, which led to infected animals, contaminated meat and ill/sick people.

Please correct me if I'm wrong,; the recollection of my memory about a research done in the past might not be the most accurate.