When changing feed brands we always recommend that you mix your feed with what they are currently eating to ease them into a new diet and avoid any GI upset. We typically recommend feeding 1lb. per day starting out and increase to 3-4 lbs. per day depending on the age, condition, and metabolism of the horse in question. Easy keepers won't require as much feed as some others. Each horse is an individual and every "body" is unique, if you have questions about anything please click the SAY HELLO tab and we will gladly assist you further.