Great behind the scenes photo of Milt Kahl and Roger Miller, the voice of Allan-a-Dale, the rooster from Disney's 1973 film Robin Hood. As far as character designs, this is one of my favorites. This character needed to be depicted in some kind of period costume. How do you do that with a rooster?
Mild did have some experience with clothing on poultry, having designed and animated Ludwig von Drake in the early 1960s.
For an extensive post on Allan-a-Dale from 2011 go here:
https://andreasdeja.blogspot.com/2011/09/allan-dale.html