There! Do you see what I mean!? With the head facing the other way!? That's what I saw, when I saw it in your gallery!!!
I did red line in the end! Just how the wing shape would be!!! You'd have to detail it properly though, it was just a quick sketch!!!
EDIT:In fact I was looking at mine and yours together. Your head is more field mouse! If you look at mine, even though the head is hidden, you can see that it has a long nose! Something to think about!
You're a good artist, and I think you could correct the wing shape as I have, but from looking at mine you'll be able to easily adjust your head without red line! You just need to see it I guess. I love your head though, but if you want a rat, mine is the way to go, if you look though the wing so to speak!!!
Hope this helps!

