Monster: Sentinel Chicken (Patreon)

This magically enhanced chicken has incredible senses and is trained to loudly go after any creature not wearing a particular object.

The inspiration for this came from sentinel chickens, collections of chickens kept in open-sided coops that are regularly check for mosquito-born illnesses. When the chickens test positive for infection, humans know to take steps to control mosquito populations to slow or stop the spread of diseases like malaria and dengue.

I just thought the name sounded fun for some guard poutry.