Howdy Reg! That was a splendid hoss Glenn rode in that film.It sures looks like him again in 3:10 To Yuma and Cowboy also.If you have the legendary Will Rogers teaching you to ride,then you were taught by the very best.That horse was a high headed strawberry roan with flaxen mane and tail,high feet stockings and with a huge blaze.All these factors do not lean towards being a Quarter Horse in my book.He also had snapping high knee action and that is not typical movement for a Quarter Horse.The American Tennesee Walker is consistent with the color,the high white stockings,the high head,the movement in gait.Roy Rogers horse,Trigger was half walker also.The horse in the 60's Glenn rode in half dozen westerns is similar in that he was high headed and held his tail up,something a Quarter Horse doesn't do.All I know is that both horses were a hand full and if you didn't know what you were doing,you were a lot safer on the ground petting them.Glenn Ford was a horseman!