Pen animals

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Pen animals, or farm animals, are animals with special rules in regards to habitat.


Pen animals do not respect regular zones. Instead, they must be roped into an enclosed area, known as a pen, and designated by a pen marker. For pen animals, fences and fence gates are impassable, but animal flaps are considered open. Other terrain, such as walls and doors, can also be used to enclose a pen, which will help enemies from breaking open the pen as easily (although pen animals will never be attacked directly). Walls however cost 5x as many materials to build, and can't be stepped over. Additionally, if a room is enclosed in the creation of a pen, players will need to ensure roofs aren't being constructed or they'll stop grass from growing.

Outside of a pen, or if the pen has an open door, animals will enter into the roaming mental state. Roaming animals will wander away and eventually leave the map. They can be roped into a caravan hitching spot or a pen (closed or not) by a colonist with enough animals skill for that animal.

In general, pen animals can eat hay, and graze on grass and other naturally growing vegetation. They all have 0 trainability. These are not traits of being a pen animal, but all pen animals have these traits.

Pen animals will not actively be targeted by raiders (though can be caught in the crossfire).


  • Pen in combination with auto-slaughter can be extremely powerful to reduce the amount of micromanagement done by the player. The use of pens and auto-slaughter is a necessity for any colony with the rancher meme Content added by the Ideology DLC.
  • When choosing a pen animal to farm, you may want to consider animals that have more purpose than their meat. For example muffalos can provide wool and can act as a pack animal.
  • If a pen isn't large enough to sustain your animals, but it's still growing season, then consider planting dandelions inside the pen. Once the dandelions reach 10% growth, they are considered edible. This is less effective than growing haygrass outside of the pen, but can be used in a pinch.

Pen animal list[edit]

A complete list of the current pen animals. Animals not on this list can be designated to an allowed area and do not require a pen.

Name Hunger rate[1]
per day
Pack animal
Alpaca Alpaca 0.44 Alpaca wool 4.5 Check.png
Bison Bison 0.86 Bison wool 8 Check.png
Boomalope Boomalope 0.86 Chemfuel 11 Ex.png
Capybara Capybara 0.36 Ex.png
Caribou Caribou 0.44 Milk 5 Ex.png
Cassowary Cassowary 0.45 Cassowary egg (fert.) 0.3 Ex.png
Chicken Chicken 0.22 Chicken egg (fert.)/Chicken egg (unfert.) 1 Ex.png
Chinchilla Chinchilla 0.2 Ex.png
Cow Cow 0.86 Milk 14 Ex.png
Deer Deer 0.32 Ex.png
Donkey Donkey 0.52 Check.png
Dromedary Dromedary 0.86 Milk 9 Check.png
Duck Duck 0.28 Duck egg (fert.)/Duck egg (unfert.) 1 Ex.png
Elk Elk 0.86 Milk 11 Ex.png
Emu Emu 0.45 Emu egg (fert.) 0.3 Ex.png
Gazelle Gazelle 0.24 Ex.png
Goat Goat 0.36 Milk 4 Ex.png
Goose Goose 0.45 Goose egg (fert.)/Goose egg (unfert.) 0.5 Ex.png
Horse Horse 0.68 Check.png
Ibex Ibex 0.32 Ex.png
Muffalo Muffalo 0.86 Muffalo wool 8 Check.png
Ostrich Ostrich 0.67 Ostrich egg (fert.) 0.3 Ex.png
Pig Pig 0.8 Ex.png
Sheep Sheep 0.36 Sheep wool 4.5 Ex.png
Toxalope Toxalope Content added by the Biotech DLC 0.86 Ex.png
Turkey Turkey 0.45 Turkey egg (fert.) 0.75 Ex.png
Wild boar Wild boar 0.48 Ex.png
Yak Yak 0.86 Milk 11 Check.png
  1. Hunger rate of a fully grown specimen in nutrition per day. For reference, each unit of hay and most other raw foods is 0.05 nutrition.

Version history[edit]

  • 1.3.3066 - Pen system added. Prior to this, all animals would respect area restrictions.