First, let me preface this with the fact that I can't modify the feed in any way other than what I am going to do here :)..the horse is on full board so things like free choice hay isn't an option.
I am about 15 weeks into a new horse, full TB, off-track, 16.2 and last taped at 1100 pounds; he has a larger bone structure such as would be seen in a Trakehner. He was about 100 pounds underweight and lacked muscle tone when I got him. He was originally on 6 quarts, about 10 poundish of feed per day with 4 flakes of hay.
When I got him hme, and over a period of four weeks, he was upped to about 5 pounds of textured feed, 5 pounds of Horsemen's Edge 100 pelleted 10:6 feed, 6 cups of Rice Bran pellets about 24 pounds worth of decent quality grass hay per day. I can't say for sure what type, whether Timothy or Bermuda as it looks to be a combination of both, but, I don't think it contains any alfalfa. He was, and is still on, a pre-and probitoic suplement, standard coat and hoof supplement and was only recently taken off of the muscle mass supplement since has has gained the weight and muscle he needed.
Now that he has done so, I want to modify things a little. I am looking at changing over the Horsemen's Edge to the Ultium Competition and taking out the straight Rice Bran pellets all together. It will increase the Protein marginally, about 2% and decrease the fat marginally, by about 1% but the Ultium does contain both beet pulp and rice bran.
The pics attached show him the day I brought him home and then 10 weeks later (about 5 weeks ago). He hasn't changed over much since the 10 week pic was taken.
Does anyone have any idea with all else remaining the same reagrading hay and textured feed, would I need to cut down the overall Ultium and textured feed (once he is completely converted) to less than the 5 pounds per day of each feed he is getting now? Some research has indicated that horses on Ultium can be fed less and get the same results as other feeds.
He is in what I guess would be referred to as medium work as he is working training level dressage training with no jumping, being ridden for an hour to an hour and a half 5-6 days a week. He is quite energetic but not specifically "hot" in attitude.