▁never ▁left ▁R ex ▁alone ▁on ▁set ▁unless ▁the ▁horse ▁was ▁locked ▁in ▁his ▁own ▁tra iler . ▁ ▁In ▁one ▁scene ▁from ▁the ▁ 1 9 2 7 ▁silent ▁film ▁No ▁Man ' s ▁Law , ▁R ex ▁protect s ▁the ▁mod esty ▁of ▁a ▁young ▁woman ▁( Bar bara ▁Kent ) ▁sw imming ▁in ▁the ▁n ude ▁from ▁a ▁pair ▁of ▁row dy ▁villa ins . ▁Ch asing ▁one ▁around ▁in ▁circles , ▁re aring ▁up ▁and ▁bu ck ing ▁like ▁a ▁wild ▁must ang , ▁until ▁he ▁finally ▁runs ▁him ▁off ▁of ▁a ▁cl iff , ▁he ▁s ne aks ▁up ▁behind ▁the ▁other ▁and ▁n ud ges ▁him ▁with ▁his ▁nose ▁over ▁the ▁led ge ▁and ▁into ▁the ▁water ing ▁hole . ▁He ▁then ▁pro ds ▁the ▁now - cl oth ed ▁young ▁woman ▁back ▁to ▁her ▁father . ▁ ▁Sound ▁films ▁were ▁obviously ▁not ▁a ▁problem ▁for ▁R ex , ▁who ▁continued ▁to ▁star ▁in ▁features ▁and ▁serial s . ▁By ▁now ▁R ex ▁was ▁a ▁full - f led ged ▁" movie ▁horse " ▁acc ustom ed ▁to ▁cam eras ▁and ▁crew ▁members , ▁but ▁he ▁could ▁still ▁revert ▁to ▁his ▁wild ▁ways ▁on ▁occasion . ▁▁ ▁During ▁film ing ▁of ▁The ▁Law ▁of ▁the ▁Wild ▁R ex ▁made ▁a ▁comm otion ▁on ▁set . ▁ ▁When ▁he ▁charged ▁the ▁camera ▁( with ▁Lind ell ▁behind ▁it ) ▁as ▁intended ▁he ▁did ▁not ▁stop ▁when ▁Lind ell ▁gave ▁the ▁signal ▁to ▁do ▁so ▁( by ▁holding ▁his