Join Date: Sep 2009
Location: Northwestern, WA
Hmm. I never thought of hay as a filler. To my understanding, hay/roughage is the cornerstone of any horse's diet and grains are quick, but not sustaining sources of energy. Unless the horses gets thin easily, they shouldn't need grain. Hay is easier on their digestive tracts because it doesn't get held in their hindgut and consequently ferment (a risk with grain if you feed large quantities). All my horses live on a 100% roughage diet, and if they get skinny, I add a lipid additive to hay pellets and that usually sorts them out.
Peace, Love, and Ponies of all shapes and sizes.