I can't draw the legs, I tried, but I fail at legs.
If you can't read my writing, this is what it says + More;
-Forelock needed, all types of Equine have forelocks. It doesn't need to be as drastic as I have drawn it, I just can't draw eyes. x3 For a galloping/cantering horse the forelock (if long) needs to be flowing backwards, like the mane and tail.
-Less protruding chin, horses don't have the big dip as you gave yours, they have a slight dip, but it depends on the breed to how large it is.
-You need larger nostrils, they don't have small dot like nostrils, they are more tear drop shaped.
-Mane needed, long manes need to be flowing backwards, like the forelock and tail
-Tail needs to be flowing.
-Ears need to be smaller
-Neck needs to be thinner (thinner bulge)