Antibiotics are used in feed and water as well as in injections, vitamins, vaccinations and parasite controlled. Antibiotics are generally administered for ninety days or more in feedlots in the United States. Less than 20 percent of all animals in feedlots were given antibiotic injections, but about 60 percent received vitamin injections.
Growth hormones in beef are primarily administered using a small pelleted implant that is a placed under the skin on the back of the ear of the animals. The implants are designed to release the hormone slowly over time into the animal’s bloodstream.
Drug used in beef production