My bag was Empower Balance that was moldy. Red pellets had turned to green powder.
Even strategy healthy edge is too much for my old pony. I do use Purina's mini horse and pony food for my 16 hand TWH. The other 2 get a mix of the ration balancer, a local hay stretcher that has an NSC of 6.9% and a couple cups of alfalfa pellets mixed in. The walker also gets some of this mix because she isn't getting near a full ration of the pony food. So far this has saved the old pony from a grazing muzzle. Pony does get a handful of the pony food in hers, just enough to make most of the mag-ox stick. Purina said the mini horse food has an NSC of 17%.