Short-term effect of different inclusion levels of dietary red grape pomace silage on productive performance, milk composition, and health indices in dairy goats

• Ensiled red grape pomace (RGP) shows strong potential as an alternative feedstock for dairy goat diets. • Up to 18% DM inclusion allowed nutritionally balanced diets comparable to a standard ration. • Feed intake and acceptance remained unchanged when pomace replaced part of the ration. • A 12% DM inclusion tended to enhance milk yield without increasing intake levels. • Polyphenol‑rich RGP improved metabolic response linked to carbohydrate digestion.