In order to tame an equus you will have to sneak up behind it and feed it Rockarrot and ride on it and again feed it rockarrot it will start moving but won't run to far when it trys to kick you off feed it another rockarrot and repeat it and boom you have tamed an equus do the pursuit tame equus to find it keep flying or walking and an arrow will appear showing its location and after you tame it with pursuit you will get its saddle the saddle will work as a mortar and pestle.