I wanted to paint black blood, in particular blood in moonlight. The red would be greatly diminished and it would mostly appear black. And this being me I had to paint the skin with magenta and moss green. Because why not.

Only thing I'm not quite happy with is the eyes. I wanted them to glow like predators do when the light hits them in the dark. Like red beacons (although sometimes foxes will have green reflections like sheep). I didn't quite get the effect. But I know how to get it next time.