The Iodized Livestock Salt Block is a specially formulated bag and block salt with calcium iodate to help promote proper thyroid gland activity, which helps produce the necessary levels of thyroid hormones for optimum performance. Iodine deficiencies in livestock can lead to goiter (an enlargement of the thyroid gland), a condition most often found in young animals. This salt product is intended for beef cattle, dairy cows, horses, goats, pigs and sheep. Iodized salt blocks are weather resistant for free choice feeding.   Highly-effective salt block is intended for beef cattle, dairy cows, horses, goats, pigs and sheep Iodized salt block is weather resistant for free choice feeding Iodine deficiencies in livestock can lead to goiter (an enlargement of the thyroid gland), a condition most often found in young animals50 lb. size salt block