Horse Feed Recommendations

When I went to pick up a sack of grain from our local miller, I was stunned to learn they had folded up shop and retired.

Up an unassuming country road, best horse feed ever!

I'm gutted - the girls did SO well on this mix, and I liked supporting a local family too! 

So while I'm looking into new foodstuffs, to see if anything comparable exists:

What are your favourite horse feeds?