We used to overseed our hay fields with oats. We would get our first cutting well before they were really ripe enough to combine. This bumped up the quality of our hay (we were actually raising hay for cattle, not horses, at the time.) When the vet commented on how nice the hay would be for horses, my father in law rolled his eyes because he knew hubby and I would snag some of the "oat hay" for our horses after that.
He was right!
I would give anything to have that hay now!
We've been supplimenting our hay/pasture with alfalfa pellets and timothy pellets. This year, because the grazing is nonexistant, we've had to use our winter hay already. We are supplimenting with the same feed we would use in the winter - the alfalfa or timothy pellets (depending on which horse) and soaked beet pulp, along with flax meal. We may have to break down and add a little regular horse feed stuff when it gets cold to add calories and keep their weight up.
Plain Old Dee, horses Dancer and Rain I believe in dragons, unicorns, good men and other mythical creatures!