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“Maybe I’m looking for you to test my wares... perhaps I’m judging how well you follow instructions... or maybe I just really hate chickens.”
The chicken is an animal used as a running gag throughout the Counter-Strike series. It has appeared in Counter-Strike, Counter-Strike: Condition Zero, Counter-Strike: Condition Zero Deleted Scenes and the series' latest installment, Counter-Strike: Global Offensive. When attacked, it will let out a squawk and disappear, only to leave a few bloody feathers behind.
In both games, two chickens appear in Italy's Market. One is located to the left of the CT Spawn connection while the other is located next to the corner with two barrels in it, in the second connection to the middle. They will spawn or respawn when Terrorists or Counter-Terrorists run past their spawn points.
- A chicken appears as a hidden Easter Egg in Secret War. It is located on top of the silo entrance near the Dual Berettas. One pile of boxes will have a single metallic crate stacked on top of three others against the wall. Once said box is destroyed, the chicken will exposed. If killed (by being shot or hit a single time) it will make several sheep bleating noises, gibbing and spreading feathers on the spot.
- Another chicken also appears in Motorcade Assault, while in the sewers, the first tunnel in which the player enters will have a stack of boxes by its end. Climbing on top of them will allow the player to see the chicken hidden behind them. If killed, it will make a headshot sound.
Although still playing as a comical role in the game, chickens play a much more important role in Counter-Strike: Global Offensive. They are no longer simple static animals like their previous iterations, but are mobile and have an AI. They move around freely and make squawking noises if approached by players while running (not when walking or crouch-walking), or if shot at. If shot, they will puff into a cloud of feathers and flesh. Two variants appear, brown feathered and white feathered.
Despite being simply critters used as a joke or map decorations, chickens caused problems with their AI and noise often causing enemy and allied positions to be revealed. While they won't block players, weapons and throwables, chickens can block bullets and can obstruct a player's aim if the player is at lower ground (such as on Inferno). The obstruction will also impact/completely block the weapon's damage as well (especially the AWP where the damage is either reduced by 30% to the point where enemy can survive a single chest shot if the target has full health or completely deal zero damage and alert the victim). They can also block doors, in which a door will open toward the player or in extreme cases, if the chickens are placed on both sides, they can completely prevent usage of a door.
As of the August 29, 2013 update, the squawking noise of the chickens was reduced and chickens only get startled if a player jumps near them (only if they have clear line of sight and only have 50% chance to run off) or hears a gunshots and knife swing (only on primary swing). Oddly enough, running near them will not startle, neither silenced weapons such as USP-S and the M4A1-S will startle chickens. Sounds produced by Decoy Grenade will not startle them, but the throwing procedure will startle if it's done near them. When startled, chicks will run between 128 and 192 units (2-3 crate width) before they become passive. 
Critters & Props
- The Italy, Militia, Inferno,Cobblestone, and Rush maps contain chickens. They randomly spawn and move around freely.
- Italy also features two hung butchered chickens on the Counter-Terrorist side of market as static props. This references the two chickens that were found in the earlier GoldSrc games.
Chickens always spawn in Deathmatch, regardless of the map. 1 point is awarded should a player kill one. Even though the reward is meager and rarely sought after, it can still allow players to tip the scale of Deathmatch games.
Chickens played the role of targets in several operations.
- Prior to Operation Vanguard, missions would be randomly assigned during normal gameplay, some of which included killing chicken with various equipment.
- During Operation Vanguard in the Vanguard campaign, one of the first missions is a Supply Run mission, requiring 20 confirmed chicken kills in Deathmatch on Active duty maps. A Vertigo collection skin is awarded along with a mission unlock.
- During Operation Bloodhound in The Prodigal Son (Marksman), the player is tasked by Sebastien Hennequet to get 50 confirmed human or chicken kills in Deathmatch on operation maps. Should it be completed, Tools of the Trade is unlocked along with 300 XP. Every chicken kill awards an additional 3 XP.
- During Operation Bloodhound in Fowl Play (Marksman), the player is tasked by Booth to kill 300 chickens in Deathmatch on operation maps. Should it be completed, A Most Violent Interview is unlocked, and 600 XP is awarded. Going on chicken killing streaks of 2 or more awards 1 additional XP.
- During Operation Wildfire in Operation: Falling Sky (Wildfire), Felix Riley tasks the player with killing 10 chicken, wanting them off the battlefield while expressing a clear distaste for them.
Holidays & Special Events
Chickens have additional cosmetics or altered looks during holidays and special events.
- During the 2013 Halloween update, Chickens wore a ghost sheet.
- Starting August 21, 2014, every Counter-Strike: Global Offensive birthday features chickens wearing birthday hats and exploding into confetti when killed.
- During the Winter Offensive Update, chickens either had Santa Hats or Antlers attached to their head.
- During the 2014 Halloween update, killing a chicken makes it respawn as a zombie chicken appearing with green feathers, yellow eyes and a twisted feet. It digs itself out of the ground when spawning, crawls slowly with its wings leaning forth and explodes in a green cloud of feathers when killed again.
- During the 2015 Winter Update chickens are given sweaters featuring winged cutters motives on the top (Counter-Terrorist emblem) and double crossed knives motives on the bottom (Terrorist emblem).
- Starting with the March 17, 2016 update, chickens are given rabbit ears and are given a bunny hopping animation.
- During Halloween 2016 Update, chickens were given a pumpkin mask.
- During the 2016 Winter Update, Chickens were yet again given a sweater, albeit with the color changed from red to green.
- During the 2017 Easter, chickens are given rabbit ears and are given a bunny hopping (similar to previous event) but when chicken get scared and when they're scared, they now drop easter eggs (see gallery for all eggs models)
Bugs & Glitches
- In the GoldSrc versions of games, chickens may glitch once the round is reset post-mortem.
- If a chicken is killed, it may respawn in the middle of the round. When it does, the chicken is non-solid and cannot be killed until the next round.
- The chicken is invisible, but it is solid and can be killed.
- In Deathmatch on Mirage, chickens may get stuck in the shop in Underpass.
- On Inferno, chickens that fall into the Mexican Tunnel sometimes get accelerated to higher speeds than normal for a chicken.
- Counter-Strike (Xbox) and Counter-Strike: Source are the only games of the series not to include chickens.
- The GoldSrc games share the same chicken model.
- Although it may have been said with a sarcastic tone, Booth's speech during Fowl Play in the Marksman campaign during Operation Bloodhound may suggest a hatred towards them.
- Chicken at Wikipedia