Sweet feed and whole grains are harder for a horse to digest and they don’t really get all the nutritional values out of it because it just goes through them. You can tell that the feed isn’t broke down from looking at their poop. A pelleted feed that has a higher fat content and other values can be broke down easily with you fingers and your horse gets what he needs because of that, so, the whole grains is a lot harder break down.
I feed my horses Total Equine, it is like a pelleted feed. Horses love Total Equine because it tastes good and it has all really good nutritional values. I haven’t fed my horses Total Equine in a while and they were shedding more better after I started giving it to them again. Here is the website if you would like to read about it. Also Total feeds has many different kinds of feeds.