I guess stink eye is in the eye of the beholder, and in the context surrounding the event. Some of these stink eye's look like really annoyed chickens, but some of them look like peace loving chickens, but without the context witnessed by the photographer, I wouldn't be able to tell. When is a chicken that looks like a chicken angry, and when is she just looking like a chicken? Does there have to be intent on the part of the chicken for it to be a stink eye?