Started with some silhouettes of what he would be wearing.
Also I've thought about his backstory. He was once a human knight who crossed paths with a wizard having a bad day. The wizard wasn't too impressed with the knight transformed him into a chicken, and ran off. The knight, realized his form, and was horrified. He has to find a way to transform back to his original state whilst dodging hungry kingdom folk.
He stills needs a good name, because Sir Cock-A-Lot is pretty bad.