I don't like straight sweet feed at ALL...I use Nutrena Safe Choice which is a dry pellet and mix in Purina Omolene 200 that is an all grain feed (kinda like a sweet feed but ALOT btter) for my barrel horse..my other horse is 21 and he gets Nutrena Life Design Senior..I just don't think sweet feeds cut it..I wouldn't recommend it to anyone..and you definitely get what you pay for..Cheap prices mean cheap feed..Just my opinion..
Any feed, pelleted, textured (Omelene is textured), or whole grains that has corn or corn and molasses in it is high in sugars/starches and not that great for your horse.
Compare sweet feed to cookies. They have some nutrient value, but mostly sugar.
Compare high starch pelleted or textured feeds to cereal or power bars. They have more nutrition and even fiber/protein, but they still have LOADS of sugar and are not that healthy eaten on a regular basis.