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Rust Animal Breeder

Set each parent's genes - both copies, because the hidden one can still be passed on - and their two family marks. The results show what the lamb or calf is likely to be.

Mother

GeneCopy 1Copy 2Shows
D Dung
Y Yield
F Fertility
H Hardiness
Family marks (0–15)

Father

GeneCopy 1Copy 2Shows
D Dung
Y Yield
F Fertility
H Hardiness
Family marks (0–15)
All genes good
–
and not inbred
Inbred
–
family marks match
Twins
–
needs a good-fertility mother
Wool per hour
–
expected, adult

Odds for the young, gene by gene

GeneShows goodShows OKShows badWhat it does

How breeding works

  • Each gene has two copies; the animal shows the better one, and either copy can be passed on.
  • A young animal gets one random copy of each gene from each parent, and one random family mark from each parent.
  • If its two family marks match, it is inbred.
  • Since 2026-11-05 you own an animal by buying it or by it eating at your trough; unowned animals don't breed.
  • Owned free-range cows stop breeding past 6; penned animals stop when the pen is too small for the herd.
  • Pregnancy takes about 10 minutes and young grow up in about an hour.
  • Inbred: Good acts as OK and OK acts halfway between OK and Bad (Bad stays Bad); the real copies are still passed on.

Facepunch doesn't publish gene numbers; these come from fan tools that read the game files (medium - three fan sources that read the game files agree; Facepunch publishes no gene numbers). Livestock was reworked on 2026-11-05 - one source says the Longevity gene was removed then, so it isn't listed. Checked 2026-11-13. Sources: Facepunch - Livestock Update devblog (2026-10-01); Facepunch - Printed and Polished devblog (2026-11-05); Godclone livestock planner (fan tool, 2026-10-04); Rust Animals - livestock genetics (fan guide); Rust Animals - sheep (fan guide); Rust Cow Tracker guide (fan tool, 2026-11-06).

Breed Rust sheep and cows by their genes: set each parent's two copies of Dung, Yield, Fertility and Hardiness plus their family marks, and see the odds for the lamb or calf - every gene, the chance it's inbred, twins, and the wool or milk you can expect.

Întrebări frecvente

Each gene has two copies and the animal shows the better one. A young animal gets one random copy of each gene from each parent, so two good-yield parents always make a good-yield lamb, while two parents that each hide a bad copy have a 1 in 4 chance of showing it.

Every animal carries two family marks. The young gets one at random from each parent, and if the two match it is inbred: its good genes act as only OK and its OK genes act worse.

About 6 wool per fleece with bad yield, 10 with OK and 16 with good, regrowing faster with better yield - roughly 43, 120 and 307 wool an hour.