Following the increasing interest to raise livestock without the use of antibiotics, several feed additives have been evaluated for the role they could play in protecting or supporting animals through a period of disease.
One such trial provided an essential-oil based feed additive to chickens facing a necrotic enteritis challenge. The additive included a blend of thymol and carvacrol and was found to reduce the presence of gut lesions following the disease.
Another research team looked to direct-fed microbials to support birds through a disease challenge. Birds receiving the feed additive were found to have reduced gut lesions compared to control group birds facing the same experience.