Personally, I prefer feeds from FRM, which is only in the southeast four states of Florida, Georgia, Alabama and South Carolina. It's cheaper than Dumor and also better quality. It's formulated by Kentucky Equine Research, checking into what's what for horses. The one I feed is Cool Balance which is kind of similar to Dumor's Equistages. With Cool Balance, you feed according to what the horse does. Light, Moderate, Heavy work, Broodmare, Weanlings, Yearlings, Stallions or simple maintenance of horses. If you are in one of those four states and wish to check out FRM, or even check it out of curiosity, the website is www.frmfeeds.com
I preffer FRM, but that's me. Dumor is fifty cents more and has less of certain vitamins/fats/fibers/what have you than FRM. Or at least, that's in my area.