Sketch of Diesel, my cat

So this is a quick sketch I did of my presious cat named Diese (because she purrs like an diesel engine). She was laying so still under a bush, and after observing her for a while, I found her position rather interesting, so I decided to draw her.
She turned out kinda bitchy looking, but otherweize I'm pretty pleased with the result.
But I'm still not good at drawing "realistic" stuff.......

review people?