Coming in September, purchase a minimum of 3 bags of any Sentinel branded product and save $1.00 per bag. All current users can take advantage of these savings while others will be provided with an incentive to try. Sentinel is a full line of nutrient release formula feeds, specifically formulated for the stages of your horse’s developmental and activity requirements. It’s good for your horse. It’s easily digestible. It’s the protection you’re looking for.