At the counter
House rats in an Animal Cage, keep accessible food or a working feeder with them, and check hunger, health and crowding daily. Keep rat meat out of their feed.
Release 1.0; source reviewed. Not independently play-tested.
Build one sustainable cage first
The Rat Wrangler start supplies a cage, rats and food. Other starts can reach ranching through Joe Wild's network, or acquire rats with a Mouse Trap. Check a new animal before adding it to your breeding group; a captured rat is a possible source of stock, not proof of good health or useful genes. NPC Tips' release rat guide.
A working colony needs food, room and maintenance. Adding breeders before those are secure can increase tomorrow's costs faster than tomorrow's meat output.
Feed the animals you actually have
Put accessible food in the cage or install a Livestock Feed Dispenser there and blend food into its calorie reserve. Check both the reserve and the rats' hunger the next morning. A pile of unsuitable items beside a rat is not evidence that it ate.
Never use rat meat as ordinary feed. Wikily describes a prion risk, and NPC Tips identifies prion as a lasting problem without a removal route in the reviewed data. If a dispenser contains rat-meat calories, the release guide recommends Empty to clear that reserve before refilling it. Rat mechanics reference.
Check these four conditions every day
| Condition | What to do |
|---|---|
| Hunger | Refill before expanding the colony |
| Health | Identify illness and review feed and crowding |
| Space | Clear corpses and feces; split an overcrowded group |
| Cage durability | Repair before the container becomes a failure point |
Wikily reports that low hunger slows growth and reduces breeding performance. Overcrowding and a dirty cage add further health pressure. Weight alone therefore gives an incomplete picture of how the colony is doing.
Select breeders rather than keeping every pup
Keep a male and female together when you want breeding, then use the Gene Scanner to compare traits. A pregnancy is not guaranteed just because both sexes are present. Hunger, health and space also matter.
The credited rat-tutorial walkthrough demonstrates separating valuable breeders and using a Wire Cutter to prevent unwanted breeding. Its exact build is uncertain, so treat its breeding priorities as one creator's method rather than a proven optimum for the current release.
Harvest according to the animal and the shop
A blade is used to kill a rat and then butcher the corpse. Decide which animals are breeding stock before doing that irreversible step. Do not apply one universal harvest day to every rat: growth, hunger, illness, available space and the cost of another night's feed all change the decision.
This site has not measured a best weight or male-to-female ratio. Start by keeping the colony healthy and the business solvent; optimize only after you can compare several complete growth and sale cycles. For feeding failures, continue to the dispenser checklist.
Check the record
Sources & version notes
Use the current game prompts when a build changes. This guide distinguishes source review from hands-on testing.
- Wikily: rat growth, health and breeding
- NPC Tips: release rat care and prion
- GameWikiStation: credited rat-tutorial walkthrough; build uncertain