High iodine all trace helps farmers manage the trace element status of their herd of cows over critical periods of the production cycle high iodine all trace boluses are designed to lie in the reticulum and dissolve from a constant surface area thus providing a continuous and regular supply of nutrients to the cattle high iodine all trace boluses have an active life of 180 days for cow all trace boluses are designed to provide to grazing cattle that proportion of their dietry requirement of