I'd change him to a 10% protein, lower calorie food if it were me, At least while he's in the stall.
He really doesn't need much in the way of grain but I like feeding twice a day myself and understand why you want to do it.
Be careful....if a horse is going to colic, it's usually when they're confined to a stall.
So, cut back on the feed, change to maintenance only feed, and make sure there is plenty of water available.
From the link you provided:
Specifically formulated for premium endurance in performance and maintenance horses
A beet pulp-based feed high in calories, fat & fiber and low in nonstructural carbohydrates (Does not contain corn, barley, or oats). Increases fermentation and decreases digestive problems such as hindgut acidosis in the digestive system of the horse. High fiber and high fat ingredients increase caloric intake without increasing starch. This reduces excitability and heightened awareness allowing for a much cooler horse.
Equus Fiber Max Omega
High-calorie, high-fat, high-fiber, beet pulp-based feed
Specifically formulated for yearlings, broodmares and performance horses
Guaranteed Analysis Crude Protein Not less than 12.0% Crude Fat Not less than 10.0% Crude Fiber Not more than 15.7% Ash Not more than 8.0% Calcium Not less than 0.53% Calcium Not more than 0.93% Phosphorus Not less than 0.42% Vitamin A Not less than 2200.5 iu/lb Selenium Not less than 0.40 ppm Copper Not less than 31.5 ppm Zinc Not less than 95.39 ppm
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
Last edited by gunslinger; 02-05-2013 at 11:30 AM.