I will soon become the proud companion of a Percheron mare. Prior to me, this mare did some eventing, mostly training level dressage, and some jumping. She is presently on Ultium feed. I will be doing training level dressage and simply hacking out while working with her about 4-6 days per week. I am concerned that the Ultium feed will be too much for her in consideration of our activities. Would you please recommend a quality feed? What specifically should I be looking for in a feed for a Percheron that would differ from other horses? I have access to Purina, Blue Seal, Nutrena, Triple Crown, Pennfield, and Southern States. Thank you for any help you may willing to offer .