Giving Hay Bales Doesn't Increase Chances Of Taming A Full Grown Horse

I Give A Hay Bale To A Full Grown Horse Hoping To Increase The Chances Of Taming The Horse (Like Wheat (9x Of Wheat)), But It Gives Me The Signal That It Doesn't Work... Although To Be Honest With You, I Don't Know If This Is A Bug, But If Not, They Should Make That Happen, Though...