Rust Cow Guide: Taming, Breeding and Genetics

What are cows used for in Rust?

Cows give Milk (a drink and a tea ingredient), Dung for the Biofuel Generator, and good harvest yields. You can also breed them and sell adults to the Livestock Vendor for scrap and items.

Cows arrived in the Livestock Update on 1 October 2026, alongside sheep. They only become useful once they're tame: wild cows never grow up, never age and never drop dung. Tame them, keep them fed, watered and not overcrowded, and they produce resources for as long as they live, which is about 48 hours of play time at OK genes.

Every cow and bull carries five genes that change how much it produces, how long it lives and how fast it breeds. Breeding good parents together is how you build a better herd; see livestock genetics for how inheritance works.

Where to find cows

Wild cows spawn in Forest and Tundra biomes, in groups of 1–4, on open fields, forest edges, roadsides, riversides, lakesides, rail lines and hilltops. They don't spawn in Snow, Desert or Jungle.

Cows and bulls share a population of about 2 per km², so on a normal map you'll find small groups scattered through the temperate and tundra areas. Look along rivers and lakes first: they need water and the open grass nearby suits them.

If you'd rather not search, the Livestock Vendor at the Ranch and the Large Barn sells calves (see below).

How to get a cow

There are three ways to get one:

• Tame a wild cow or calf. Free, takes about 5 minutes per animal. Wild adults are territorial, so approach carefully.
• Buy a calf. The Livestock Vendor at the Ranch and the Large Barn sells calves for 300 scrap, male or female. They arrive already Bonded to you and on a lead. A calf grows into an adult in about 1 hour once it's yours.
• Breed your own. Keep a tame bull and a tame cow together. Calves inherit their parents' genes, so this is the only way to get reliably good stock.

How to tame a cow

Stay within 20 m of the cow for about 5 minutes without hurting it. It moves from Known to Tolerated to Bonded. Once Bonded it's tame: you can lead it, milk it, and it breeds, ages and drops dung.

1. Find a cow and get within 20 m. Bulls, and cows guarding a calf, will warn and then charge if you get too close, so keep some distance at first.
2. Stay nearby. After 5 seconds it's Known, after 30 seconds Tolerated (adults stop threatening you), and after 5 minutes Bonded.
3. Don't hurt it or its herd. Hitting the cow costs 60 seconds of trust; hitting another herd member costs 30 seconds.
4. Don't wander off before Bonded: trust below Bonded fades when you leave. Bonded trust is permanent.

Curious animals trust you twice as fast. Eating a Shepherd's Pie also builds trust faster and makes livestock treat you as at least Tolerated, which stops the charging.

When a cow becomes Bonded, your Tool Cupboard becomes its home. Calves born later inherit the same bonded players and home as their mother.

How to lead and move a cow

Once a cow is Bonded you can put it on a lead and walk it home. The lead breaks if the cow ends up more than 7 m away, so move slowly and avoid obstacles.

Plan your route: cliffs, rocks and tight doorways are where leads usually snap. If it breaks, the cow stays tame, so just walk back and lead it again.

Build the pen before you go out. Facepunch added an Animal Fence and Animal Gate for this, and with the new navigation system enabled, animals can walk into player structures and respect doors.

What do cows eat?

Cows graze grass and forest ground on their own, and eat food you put in a Hitch & Trough within 25 m. Trough food only fills them to 80%, so they still need some grazing. They drink from rivers, lakes or water containers.

Grazing is free but limited: after 2 grazes, a 5 m patch is overgrazed for 30 minutes. A small pen runs out of grass fast, so either give the herd room or top up the trough.

The best trough foods by fullness are Brioche Bread, Bread Loaf and Potato. One Potato fills a cow by 30%.

Water

Cows drink fresh water 0.05–0.5 m deep at rivers and lakes, or from any of these: Hitch & Trough, Water Barrel, Small Water Catcher, Large Water Catcher, Water Purifier, Powered Water Purifier, Water Pump, Paddling Pool, Above Ground Pool. Each drink from a container uses up to 200 ml.

Cow needs and condition

A cow's condition follows the lowest of three needs: food, water and space. Wild cows never drop below 50% condition, but a neglected tame cow can die.

Low condition costs you output: dung comes up to 3× slower in poor condition and stops entirely below 15%. The Hardiness gene sets how low a need can drop before condition suffers: 71% with Bad Hardiness, 50% with OK, 33% with Good.

How to milk a cow

Walk up to a tame adult cow and interact with it. No bucket, tool or container is needed. At OK genes you get 1 Milk and can milk her again after 5 minutes. Bulls and calves can't be milked.

Only tame adult females give milk. The Yield gene changes both the amount per milking and the cooldown:

Good Yield is a big jump: about 3.2× the milk of an OK cow, because she gives 2 per milking instead of 1 and recovers faster. If milk is why you keep cows, Yield is the gene to breed for.

Why isn't my cow giving milk?

• She isn't tame (Bonded) yet, or she's a calf. Calves need about an hour to grow up.
• It's a bull. Check before you buy: vendor calves can be either sex.
• She's still on cooldown: 5 minutes at OK Yield, up to 8m 20s at Bad.

What is milk used for?

Drink it, add it to tea to make the effect last longer, or chill it for 4 hours to skim it into Skimmed Milk and Cream. Cream makes tea effects stronger.

• Drink it: +60 calories, +45 hydration, +2 health.
• Milky teas: 1 Pure tea + 3 Milk makes the Milky version of most pure teas. Milk increases how long the tea effect lasts.
• Skim it: 4 hours in a powered fridge turns 1 Milk into 1 Skimmed Milk and 1 Cream. Cream makes tea effects stronger.
• Biofuel Generator: 1 Milk gives 1.5 Low Grade Fuel.

Only time in a powered fridge counts toward skimming; snow doesn't. Adding fresh milk to a stack resets its progress to the lower value, so skim in separate stacks.

Cow genetics

Every cow and bull has five genes: Dung, Longevity, Yield, Fertility and Hardiness. Each gene has two copies, rated Bad, OK or Good, and the cow uses the better copy.

Here's what each rating does to a cow. The genetics guide explains inheritance, inbreeding and god clones in full, and the gene reader turns a cow's genes into these numbers for you.

Bulls follow the same table except they can't be milked; their Fertility sets the male breeding cooldown instead.

Best cow genes

The best possible cow is a "god clone": Good on all 10 copies. Short of that, which gene matters most depends on what you keep cows for.

Remember the better copy is the one that counts. A cow with one Good and one Bad copy of Yield milks exactly like a Good/Good cow. The difference only shows when she breeds: the Good/Good cow always passes on Good.

How to breed cows

Keep a tame bull and a tame adult cow together and keep them fed and watered. Pregnancy lasts 10 minutes. Afterwards she can't breed again for about 1h 6m (OK Fertility); the bull's cooldown is 10m.

• Both must be tame (Bonded). Wild animals don't breed.
• You need a bull and a cow, both adults. Calves can't breed until they grow up.
• Pregnancy: 10 minutes.
• Cooldowns: set by each parent's Fertility gene.
• Calves inherit one random copy of each gene from each parent, plus their mother's bonded players and home.

Avoid breeding close relatives: inbred calves have weaker genes. Use the breeding calculator to see what a pairing is likely to produce before you commit.

Why won't my cows breed?

• One of them isn't Bonded, or is still a calf.
• The cow is pregnant or on cooldown (up to 1h 41m with Bad Fertility), or the bull is on cooldown.
• Both are the same sex. Calves are 50/50, so check before relying on a pair.

Bulls vs cows

Attacks: headbutt (35 blunt), kick (15) and back kick (15). One bull can serve several cows, since his cooldown is short. Keep spare bulls for genetic variety rather than numbers.

Calves

A calf is a young cow or bull (50/50). It grows up in about 1 hour, but only while tame; wild calves never grow up. Calves can't be milked, can't breed, and give nothing when harvested.

You get calves by breeding, by taming a wild one, or by buying one for 300 scrap from the Livestock Vendor. Vendor calves are already Bonded and on a lead, but they count as wild when you sell them later, so they fetch less than farm-bred animals.

Calves are passive and flee, but their mother isn't: cows protecting a calf will charge you until they trust you. Calves have 450 HP and need food, water and space like adults.

How to sell cows

Lead a healthy adult cow or bull to the Livestock Vendor at the Ranch or Large Barn and into the pen next to him. He makes up to 3 offers; reject all three and he won't buy that animal for 15 minutes.

• Only adult animals that are not pregnant can be sold.
• Lead the animal into the pen next to the vendor. He lists at most 4 animals at a time.
• Each animal gets up to 3 offers. Rejecting one shows the next. Reject all three and he refuses that animal for 15 minutes.
• Offers are paid in a mix of items and scrap, picked at random up to the offer value.
• About 5% of offers are generous, adding 10–25% extra value.

Price depends on species, genes, condition and age, and farm-bred animals are worth more than wild ones. Animals bought from the vendor count as wild.

Offers can include items such as metal fragments, low grade fuel, ammo, gun bodies and even weapons instead of pure scrap, so a lower-value offer can still be worth taking if it contains something you need.

Cow resources

Harvest yields

Other knives, hatchets and the Salvaged Axe give the same amounts (minus the Head Bag) but slower. Blunt and low-tier tools give less.

Dung only drops from tame animals, despawns after an hour on the ground and stacks to 100. The Biofuel Generator turns organic matter into Low Grade Fuel but needs stirring by hand about every 30 minutes.

Are cows worth it?

For most groups, yes, if you're online often enough to keep them fed and watered. The numbers:

• Low risk to start. A vendor calf costs 300 scrap. Grown and sold as an adult with OK genes, the vendor's offer is worth about 373 scrap, and you'll have collected milk and dung while it grew. A farm-bred cow with good genes is worth about 700.
• Milk is niche. It's mainly for teas, so one or two good-Yield cows cover most groups. Don't keep ten for milk alone.
• Dung adds up. At 6 per hour per cow, a herd of five gives roughly 30 Low Grade Fuel an hour through a Biofuel Generator, before condition losses.
• Breeding pays off over a wipe. Good genes multiply everything: output, lifespan and sale value.
• They're exposed. Other players can kill your herd through a fence, so wall in the pen if you play on a busy server.

Solo players who log off for long stretches should prefer Hardiness and keep the herd small. Compared with sheep, cows are tougher (450 HP vs 150), harvest for twice as much, and sell for more, but sheep produce a tradeable resource (wool) much faster.

Cow FAQ