I feed Progressive's ProAdvantage and am very happy with it. I had started them on TC but the dealer here is horribly inconsistent with what they keep in stock. Call 2 weeks out to order by the pallet and still couldn't get it, ridiculous. I love that I feed a very small amt (I feed less than recommended servings) just for the bit they aren't getting from the less than stellar hay crop we had this year with the drought. The largest amt of it I am feeding to 1 horse is 1 1/2 lbs per day and that is going to my 16.3hh warmblood.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.