Me too, never fed anything other than pelleted feed and this time of year when the grass nutrition is waneing I put out a mineral block. Never had any problems. I agee with DGW about the whole grain diet not digesting as well as a pellet. The digestive system of a horse is pretty much a straight shot from front to back so you want the feed to be as easily digestable as possible for absorption into their system. Does that make sense?
"Until one has loved an animal, part of one's soul remains unawakened..."
- Anatole France