A concentrated top dress wormer to be added to the daily ration for effective continuous preventive deworming. Safe for all horses, including pregnant mares, stallions and foals. One pail provides 80 days of prevention for a 1000 lb. horse. Pellet. PLEASE NOTE: This is an oversized product, there will be an additional $5.00 (per box) handling charge added to your current freight charge. This will not show up on this internet invoice but will be applied to the invoice that will come with your order. Product Number : 7866