Nothing isn't a good enough subject for a drawing, not even a dusty rubber rat. First the pure contour --
Then the slow study --
Here is everything together. Clockwise from noon -- subject, contour, finished drawing:
I have made the rat's tail too long, his body too stout, and the angle of his rear leg isn't right at all, but I'm pleased with the head.
It never hurts to do a few more contour drawings. Looking back and trying again for the proper lines is always worth taking time to do.