Chicken

Chickens are the mutated descendants of long-domesticated birds.

Background
 Chickens were widely thought to be extinct especially in areas such as the Capital Wasteland, however some survived in a homemade underground bunker and subsequently lived on the surface alongside their owners at hilltop farm ruins after the war. In other less desolate environments such as Appalachia they survived in a more natural fashion and are even considerably more common.

These radchickens have been exposed to high levels of radiation, leaving them atrophied and naked. They are slightly smaller than their pre-War ancestors, and pose no threat whatsoever. 

Appearances
Chickens are mentioned in Fallout 2, Fallout 3, the Fallout: New Vegas add-on Old World Blues and Fallout 4. Live chickens appear in the Fallout 4 add-on Far Harbor and in Fallout 76.