Let it be clear that this is a MOVABLE pivot not an ANIMATABLE pivot. What that means is that it is generally a one time deal per shot. Once the control starts rotating, translating it can cause some very funky results. If you have a character that is walking and then you use the movable pivot to make it turn left 90 degrees on its heel, trying afterwards to move the pivot over to the right heel will cause the character to translate oddly. However, if the character does a forward flip 360 degrees (essentially rotating the control back to its initial orientation), then the control can be moved and used again.
I modeled this chicken over the course of a couple of evenings. I needed a character that would offset my last one, the Rabbit of the Apocalypse. The rabbit character is tall, emaciated, and rather sickly. I wanted the next character to be more robust. So, after a buddy gave me a t-shirt from a bar in New Hampshire called the Black Cock, I knew what my next character would be.