1) Anger 2) Choler 3) Dander 4) Neck feathers of a cock 1) Bristles 
The hackles are the long, fine feathers which are found on the backs of certain types of domestic chicken. They are often brightly coloured, especially on roosters. These feathers are often used as fly lures. The term can also apply to the erectile hairs along the back of the neck of an animal, especially of a dog. ...
Hairs on neck and back raised involuntarily in fright or anger.
A rooster's cape feathers.
Long and pointed neck feathers.
feathers on the back of the head, raised when the bird is in a stressed or aggressive state
Long and pointed neck feathers
Hairs on neck and back raised involuntarily in fright or anger.
Long and pointed neck feathers that can extend across mantle and wing-coverts.
The guard hairs along the back of an animal, especially on the neck and shoulders. The hackles are often raised as a form of communication, especially to indicate aggression.
feathers over the back of a chicken which are pointed in males and rounded in females