Choline is a vitamin like compound that functions in several metabolic ways, mainly as phospholipids. It plays an important role in cell membrane integrity and is involved in lipid digestion and transport (Bindle et al., 2000). Much of the choline that reaches the intestines of ruminants is phosphatidil choline contained in protozoa (Broad and Dawson, 1976). Feeding cattle with high concentrate diets cause to decrease in protozoa numbers by decreasing ruminal pH (Towne et al., 1990). Therefore high concentration diets limit the choline supply to the intestinal of cattle. In ruminant diets supplemental choline similar to other compounds of diets affected by rumen micro organism. So if we protect it from these micro organisms, we will protect its vitamin properties. The main objective of this study was to determine the effects of rumen protected choline chloride (RPC) on milk yield, milk composition, and blood metabolites in dairy Sannan goats.