Every drawing starts out rough

http://i.imgur.com/BFbjH6H.png

Make more lines

http://i.imgur.com/HIXi19c.png

Refine a bit more

http://i.imgur.com/ZNSOnjM.png

More detail

http://i.imgur.com/I3P8w01.png

http://i.imgur.com/X38DlOy.png

The chicken returns

http://i.imgur.com/TY6pJvD.png

Trace in vectors

http://i.imgur.com/eJBDGhS.png

A quick test

http://i.imgur.com/I1iLR7G.png

Stroke Paths

http://i.imgur.com/gGwlmGq.png

First color pass

http://i.imgur.com/BA7be4e.png

Shading and Highlights

http://i.imgur.com/YSEZ1Bi.png

Final Image

http://i.imgur.com/5cOFv8g.png

The Skin

http://i.imgur.com/Dx8ydLV.png