Researchers are exploring alternatives to antibiotics in livestock due to negative public perceptions and increasing government regulations. Kansas State University beef systems specialist Jaymelynn Farney and her team are investigating whether essential oils could replace ionophores, an antibiotic used to improve feed efficiency. Some countries have temporarily banned ionophores, prompting the need for alternatives in the U.S.

Farney’s team conducted a study with 281 blackhided steers, dividing them into two groups. One group received a mineral supplement infused with essential oils, while the other received ionophores. The results showed similar performance, with a 2.15 lb. average daily gain for the ionophore group and 2.13 lb. for the essential oils group over 90 days. Mineral consumption was also similar, but the cost of essential oils was slightly lower at $13.09 per unit compared to ionophores at $14.34.

Farney also observed functional behaviors using GPS ear tags, noting no significant differences in eating, resting, or walking times, but a slight increase in heart rates for the essential oils group. The study will continue for the next four years to further explore these findings.