For Integrity Timothy, feed 10-15% less weight for the pellets relative to what was fed with the hay. So, if feeding 15 lbs. of hay, then approximately 13 lbs. of the hay pellets. Long-stem hay is important for gut health and horses drink more water with long-stem hay. I suggest you continue feeding at least 50% of the forage as long-stem hay and use the hay pellets to complement the balance of forage fed.