Slime Rancher Wiki

Chicken Breeding is a passive mechanic that allows chickens to propagate and produce chicks when hens and roostros are in range of each other.

Chickens do not require a coop to breed, and will do so in the wild or on The Ranch if left to their own devices. However a coop will speed up the process.



Every 6-16 in-game hours a check is made for an adult chicken of any type to check for a nearby Roostro. If there is one nearby it has a 50% chance to produce an egg. If successful, the resulting chick will be of the same type as the hen that produced it, and will either grow into an adult hen of that type or a roostro in 6 in-game hours. A hen will cease breeding when there are no roostros, or there are 12 other adult chickens - including Elders - in the immediate area.

Adult hens and roostros have a 5% chance to decay to an Elder Hen or Elder Roostro when producing an egg together. Elder Hens no longer produce eggs, and Elder Roostros do not sire chicks with hens.

In A Coop

Main article: Coop

Coop SP.png

While a coop is not necessary for chickens to breed, all of the chickens' breeding patterns can be facilitated by having them within the confines of one. The small size of the coop also ensures chickens cannot wander too far from one another, so are significantly more likely to breed.

  • A default coop will allow hens to produce eggs 100% of the time whenever a roostro check is made.
  • The Spring Grass upgrade will reduce chick growth time from 6 in-game hours to 3 hours.
  • The Vitamizer upgrade grants hens a 50% chance to lay two eggs instead of one.
  • The Deluxe Coop increases the adult breeding cap from 12 to 24; the upgrade also vacs out Elder Hens and Elder Roostros, ensuring space is reserved for breeding pairs.


  • The "eggs" that are produced by hens are, in reality, chicks covered in a layer made to resemble an egg, similar to the film around Plorts when produced by slimes. The top-right readout on the Overscan UI will recognize the "egg" as a chick, and can be vacced up immediately to receive the chick.
  • The Spring Grass upgrade is stated to allow hens to produce eggs twice as fast. Instead, it grants chicks the ability to grow in three hours, rather than six. Egg production is unaffected. The Vitamizer upgrade is stated to allow chicks to grow into hens and roostros twice as fast. Instead, it grants hens the chance to lay two eggs instead of one. Chick growth rate is unaffected. This means that the Spring Grass upgrade functions as the Vitamizer, and the Vitamizer functions as the Spring Grass. It’s unknown whether this was intentional or not.
Docile Pink SlimePhosphor SlimeTabby SlimeHoney SlimePuddle SlimeSaber SlimeHunter SlimeQuantum SlimeTangle SlimeDervish Slime
Harmful Rock SlimeBoom SlimeRad SlimeCrystal SlimeMosaic SlimeFire Slime
Hostile The TarrFeral Slimes
Special Quicksilver SlimeGlitch SlimeGold SlimeGordo Slimes (Party Gordo)Twinkle SlimeLargo SlimesLucky Slime
Behaviors AgitationHungerFearStackingPounce
Scrapped Meteor Slime
Meat Hen HenChickadooRoostroElder HenElder RoostroBriar Hen (Chickadoo)Stony Hen (Chickadoo)Painted Hen (Chickadoo)Chicken Breeding
Fruit PogofruitCuberryMint MangoPhase LemonPrickle PearKookadoba
Veggie CarrotHeart BeetOca OcaOdd OnionSilver ParsnipGilded Ginger (Locations)
Other WaterAshSpicy Tofu
Plots CoopCorralGardenIncineratorPondSilo
Facilities Plort MarketVacpack (Augmented Vacpack)Range ExchangeRanch HouseStarmailDecorizerChime Changer
7Zee Rewards Club Chroma PacksSlime Toys
Decorative EchoesOrnamentsChimes
The Ranch The GrottoThe OvergrowthThe LabThe DocksOgden's RetreatMochi's ManorViktor's Workshop
Wilderness The Dry Reef (Ring Island)The Slime Sea (Moustache Island)The Moss Blanket (Mushroom LakeFeral Path)The Indigo Quarry (Crystal VolcanoAsh Isle)The Ancient RuinsThe Glass DesertThe WildsNimble ValleyThe Slimeulation
The Vaults Ring Island VaultAsh Isle VaultFeral Path Vault
Features CrateWorld MapMap Data NodesWater SpringsWaterSlime KeySlime GateStatic TeleportersSlime StatueFountain (Locations)Ancient WaterOasisSolar AnomaliesDebug SprayBug ReportsRayvians
Nimble Valley projectiles Spark ShotThunderclapStatic ClingerSlooow Field
Gadget Types ExtractorsUtilitiesWarp TechDecorationsCurios
Drill JellystoneSlime FossilStrange DiamondIndigoniumGlass Shard
Apiary Buzz WaxHexacombRoyal JellyWild HoneyPepper Jam
Pump Primordy OilSpiral SteamLava DustDeep BrineSilky Sand
Other Manifold Cube
Treasure Pods The RanchThe Dry ReefThe Moss BlanketThe Indigo QuarryThe Ancient RuinsThe Glass DesertOgden's RetreatThe WildsNimble ValleyThe Slime SeaThe SlimeulationSecret Style Paid DLC Pack
Additional Information
Economy PlortsNewbucks
Characters Beatrix LeBeau (Knocked Out)NPCs (Thora WestViktor HumphriesOgden OrtizMochi MilesBObHobson TwillgersCasey)7Zee Corporation
Game Information Downloadable ContentFAQsGame VersionsUpcoming FeaturesSlimepediaControlsAchievementsLoading Screen TextsGame ModesVR Playground
Events Wiggly Wonderland (2017)Wiggly Wonderland (2018)Wiggly Wonderland (2019)Wiggly Wonderland (2020)Party Weekend
Monomi Park Ian McConvilleNick PopovichConcept ArtSlime Rancher: Original SoundtrackSlime Rancher: Original Soundtrack II + The Casey Sessions
Cut/Removed content Meteor SlimeFive Day RushUnused Features