I did horrible on this. This is a terrible picture to me.
I made your lines lighter. Hope you don't mind.
The head on the left is a tom/kitten's.
This is how I was trying to draw it. You can look through my gallery for more if you want.
My tips and advice:
Longer feet.
Straighter back.
Ears more rounded.
Pupils and eye color.
Slanted eyes.
But... shading. I don't so much of that.






