That’s interesting I think I like the oil base Viobin. Either way I would never feed oats prior to exercise.
Hate to rain on your parade Gagootsy but I call nonsense on your not feeding Oats prior to exercise.
For eg---The greatest racehorse of all time--Secretariat IMHO--would eat 16 quarts of oats daily-including breakfast on race day. So I doubt if he would have run faster on any Commercial feed out there today. 50 years on -no one has beaten his records--so while feed is v. important--ability of the horse comes first.
Ive also been in top stables--and the feed in many of those contained a staple of oats.In fact ive seen some feed mostly Oats in their feed just supplemented with some chopped carrots small amount of sweet feed and topped with flavored vitamins and minerals in a mash----fed to Champions. The tryptophan--doesnt bother the horses at all. The only time Oats are not recommended is in tie up horses---as they do better on a diet of no grain at all-check out what they eat.
Im no expert-but this is what Ive seen when I visited barns with my Dad . People have become Lazy today--just buy feed already premade thinking this is the best---its much cheaper--making your own--lot more work but then hard work pays off.