# Animal husbandry *Mechanic* · `animal-husbandry` · status: **sourced** Domestic animals are housed, fed, tended, and bred, and they yield products whose quantity and quality depend on their care. | field | value | |---|---| | aliases | livestock, ranching, animal breeding | | family | Biology & health | | substrate | Agent-based, Aggregate stocks | | math basis | Population dynamics, Genetics / evolutionary computation, System dynamics / ODEs | | feedback | Both | | player interface | Direct manipulation, Placement, Orders | | legibility | 4 | | emergence potential | 3 | | authoring cost | 3 | | compute cost | 2 | | tuning difficulty | 3 | | ai leverage | 2 | | maturity | Classic | | open questions | Can learned animal behavior and animation make individually simulated livestock expressive enough to deepen attachment without bespoke animation per species? | | core count *(computed)* | 2 | | earliest game *(computed)* | [Harvest Moon](../game/harvest-moon.md) | | earliest year *(computed)* | 1996 | | prevalence *(computed)* | 9 | | prevalence rank *(computed)* | 70 | | prevalence share *(computed)* | 0.05 | | second game *(computed)* | [Viva Piñata](../game/viva-pinata.md) | | second year *(computed)* | 2006 | | subgenre spread *(computed)* | 6 | | technique count *(computed)* | 0 | | technique exposure *(computed)* | 0.0 | | year fifth game *(computed)* | 2017 | ## Definition Owns a herd of individual animals or a count per species, each with growth stage, food state, often affection or mood, and sometimes pregnancy and genes. Each day animals eat from grazing or stored fodder, grow toward maturity, and roll for products such as milk, eggs, or wool and for births; care actions raise affection or mood, which scales yield and quality. Stardew Valley tracks friendship from 0 to 1000 and mood from 0 to 255: unfed animals stop producing but do not die, mood under 70 can skip production, quality products need mood 150, and a nightly birth check governs pregnancies. RimWorld and Dwarf Fortress breed animals that must be fed, sheltered, trained, or slaughtered; Farming Simulator ties livestock productivity to feed. Inputs are feed, housing, and care; outputs are products, meat, and offspring. ## Player Experience Routine care with compounding returns. The player builds pens and barns, keeps feed stocked through winter, and turns daily tending into reliable income. Animals can become personal: named, petted, and missed when lost to a predator or a hard winter. ## Design Levers - feed requirement per animal and the balance between grazing and stored fodder - time to maturity and product cycle per species - how care, mood, and affection scale yield and quality - breeding rate and population caps from housing size - losses: disease, predators, exposure, slaughter decisions ## Failure Modes - Unchecked breeding produces runaway herds that eat all fodder and then starve, a recurring colony-sim problem. - Daily care actions with no decisions become chores players automate away or abandon. - Animals that can never die or fall ill turn husbandry into passive income. ## Dynamics - Feed demand links husbandry to crop fields and storage, especially before winter. - Herds become targets for predators and raids, requiring fences and defense. - Breeding for traits ties husbandry to inheritance and long-term planning. ## Open Questions - Can learned animal behavior and animation make individually simulated livestock expressive enough to deepen attachment without bespoke animation per species? ## Ratings - legibility = 4 (run `2026-10-24-taxonomy-m5`): original score - legibility = 4 (run `2026-10-29-shreyko-antim-rate-scores-19`): Feeding, tending and breeding to improve output is mostly intuitive. Hidden mood thresholds and birth rolls create occasional surprises below 5, while ordinary herd management need not require deliberate info-tool analysis (3). - emergence_potential = 3 (run `2026-10-24-taxonomy-m5`): original score - emergence_potential = 4 (run `2026-10-29-shreyko-antim-rate-scores-19`): Breeding affects fodder demand, crop storage, winter survival and defense against predators or raids. These frequent chains exceed isolated unplanned situations (3), but husbandry is not a primary story engine wherever implemented (5). - authoring_cost = 3 (run `2026-10-24-taxonomy-m5`): original score - authoring_cost = 3 (run `2026-10-29-shreyko-antim-rate-scores-19`): Animal species need distinct models, products, stages and care behaviors, moderate bespoke content beyond small tables (2). Reused care and breeding rules generate much variety without requiring a large writing or voice pipeline (4). - compute_cost = 2 (run `2026-10-24-taxonomy-m5`): original score - compute_cost = 2 (run `2026-10-29-shreyko-antim-rate-scores-19`): Typical herds use modest linear updates for feeding, growth, yields and births. This exceeds negligible stock bookkeeping (1), but runaway herd sizes are a failure case rather than a reason to call ordinary use a common slowdown (3). - tuning_difficulty = 3 (run `2026-10-24-taxonomy-m5`): original score - tuning_difficulty = 4 (run `2026-10-29-shreyko-antim-rate-scores-19`): Breeding and yield feedback can make small rate changes create runaway herds, famine or passive-income dominance. This exceeds routine interacting-parameter tuning (3), but feed costs and housing constraints can stabilize balance below 5. - ai_leverage = 2 (run `2026-10-24-taxonomy-m5`): original score - ai_leverage = 3 (run `2026-10-29-shreyko-antim-rate-scores-19`): Generated animal variants and more adaptive care behavior can notably expand variety or reduce content cost beyond incremental tuning (2). The herd-care-products role persists, and a substantially new form at 4 is not established. ## Backlinks (computed) **used by:** [Autonauts](../game/autonauts.md), [Farming Simulator 25](../game/farming-simulator-25.md), [Going Medieval](../game/going-medieval.md), [Harvest Moon](../game/harvest-moon.md), [Minecraft](../game/minecraft.md), [Oxygen Not Included](../game/oxygen-not-included.md), [Stardew Valley](../game/stardew-valley.md), [Valheim](../game/valheim.md), [Viva Piñata](../game/viva-pinata.md) ## Sources - [Animals](../source/src-stardewvalleywiki-2026-animals.md) --- Provenance: created in run `2026-10-24-taxonomy-m5`; reviewed in `2026-10-29-shreyko-antim-rate-scores-19`.