Here's a very rough paintover.
My approach would be to use the mid red as a thin shadow/light edge color, with a warmup in the light areas and a cold gray magenta in the shadow. It's a rather typical approach though, especially for me. I also added a gray because hue and saturation variation is nice. I think it's fun to throw a gray in there to keep things from becoming too monotonously saturated.
Another thing I changed was: flattening some regions into flat shadow, and other into flat light. This describes volume better I feel. You're going from shadow to light in a lot of places.
n.m. the highlights. I don't know what I was thinking.
I like how the legs become thinner, it's consistent with the neck and tail, and it adds an unique, kind of Belgian Blue feel.
