Why are livestock in the United States fed large quantities of antibiotics?

Answer: to speed up the growth

Explanation:

Our actions cause pathogens to evolve resistance to antibiotics that are used to kill them. For example, in the United States, large quantities of antibiotics are fed to livestock each year to speed their growth ... coli), and other bacteria that live in livestock evolve resistance to antibiotics

to speed up growth and size

Explanation:

Antibiotics are fed in large amounts because people want to purchase bigger livestock over small organic livestock