Is my horse getting enough feed?

I just want to double check that my thoroughbred is getting enough nutrition ect. you can just see his ribs, but nothing compared to what he used to be like, what i feed him in the morning: is 2 scoops of molasified barley, 2 scoops of pony pellets, 2 cups soya bean mix, 2 scoops of chaff, and a biscuit of lucerne hay, and then at night the same except instead of lucerne hay he gets a biscuit of meadow hay, and gets a hoof and coat supplment and gets ridden 6 times a week is that enough food?