A sustained release bolus containing iodine, cobalt and selenium. Intended for adult cattle on grass or forage-based diets with a liveweight over 400 kg. 24·7 SMARTRACE® ADULT CATTLE is designed for situations where iodine, cobalt and selenium supplementation is essential in the run up to calving and service but where additional copper is not required. 24·7 SMARTRACE® ADULT CATTLE supplies the animal’s full daily requirement of each essential trace element for 180 days. Technology 24·7 SMARTRACE® ADULT CATTLE boluses are designed to lie in the reticulum.