More selenium for sure
The trace element selenium plays an essential role in the immune defense system of animals as it serves as a central building element for more than 20 enzymes which are involved in the degradation of free radicals. Thus, a deficiency in selenium can lead to an increased susceptibility for diseases, impaired fertility and performance depressions. The rumen microbiota reduces a high percentage of inorganic sodium selenite to non-absorbable elementary selenium which increases the risk for deficiency.
