Beet pulp is more palatable soaked and fills them up , don't know the coarse mix you mention if its says ok for rams then fine but it won't have the quality of a specialist ram feed , quantaties are up to you but start small and build up to what ever he will eat , as you progress then 4 feeds a day may be needed . If say you give 2 feeds of only beet pulp and 2 feeds of mix this will lessen the chances of acidosis , and rock salt would be good to make him drink and thus keep flushing his bladder , to reduce the chance of stones .