Leather horse armor not dying

I notice that when I dye the leather horse armor, it will dye that item clearly, but when i go to put the leather horse armor on a horse. The color will not be right and it will be white an some of the parts of the horse armor is missing. I don't know if this is a bug in the game or just a thing that is wrong with my game. If this is a game issue please do fix it I would love to see my horse s in beautiful colored armor.