Models
GoldSrc model
White Chicken
Brown Chicken
Ghost Chicken
Birthday Hat Chicken
Santa Hat Chicken
Antlers Chicken
Zombie Chicken
2015 Sweater Chicken
Dead Chicken
Easter Chicken
Pumpkin Chicken
2016 Sweater Chicken
Appearances
Counter-Strike
Counter-Strike: Condition Zero
Counter-Strike: Condition Zero: Deleted Scenes
The chicken's location in Secret War
The chicken in Secret War
The chicken's location in Motorcade Assault
The chicken in Motorcade Assault
Counter-Strike: Global Offensive
Regular chickens
Chickens in Italy
The two hung, dead chicken Easter Egg in Italy
Chicken in Militia
Chickens in Inferno
Holidays & Special Events
Chicken during Halloween (2013) in Italy
Antler Chicken during the winter holiday (2013) in Militia.
Santa Hat Chicken during the winter holiday (2013) in Militia.
Killing a Birthday chicken. Instead of feathers, confetti will appear.
Zombie chicken during the 2014 Halloween event in Inferno after being resurrected
Zombie chicken during resurrection
Sweater chickens during the 2015 Winter Update.
Eggs models added April 12, 2017
Egg model
Egg model (orange)
Egg model (green)
Egg model (blue)
Egg model (yellow)
Egg model (violet)
Graffiti
Chicken Graffiti on Overpass.
Other
ASCII Art of Chicken found in game files.