Looks great. Just one thing that stuck out to me was that the tail seems pinched in the middle. 

I actually have a cat that got her tail pinched somewhere outside and looks something like that. She randomly jumps sometimes (It's funny as hell), but I think it's that pinch on her tail that is causing that random jumping reaction because the cat's tail contains central nervous system nerves. I might be wrong about the cause, though. It is just a guess, after all.

But in case that I'm right, you don't want your sprite randomly jumping for no reason, right? C: