Mewgenics House Management Guide — Room Stats, Furniture & NPC Donations
Combat in Mewgenics gets all the attention, but the house is where runs are actually won. Every strong cat you field was produced by a room: its Comfort decided whether the parents bred or fought, its Stimulation decided whether the kitten inherited the good stats or the bad ones, and your donation choices decided whether you even have enough rooms to keep bloodlines apart. Most failed colonies do not die in the dungeon — they die at home, to overcrowded rooms, accidental inbreeding, contagious disease, and a food bill that outgrew the pantry. This guide covers the whole home layer: the day/night loop, what every room stat actually does, the 4-cat breeding room rule, how to set up dedicated rooms, which NPC to donate to first, and how to use strays as free genetic rescue. Get the house right and the dungeon takes care of itself.
The Day/Night Loop — and Why Food Comes First
Mewgenics runs on a day/night cycle. During the day you send a squad of up to 4 cats on adventures; at night, every cat in the house eats 1 food, then rooms resolve: cats breed, fight, recover, get sick, or mutate depending on who is housed where and what the room stats look like. The loop is Adventure → Loot → Manage House → Breed → Adventure again.
The non-negotiable rule of the night phase: every cat costs 1 food per day. Hoarding cats without food storage starves the colony — hungry cats spiral into poor health, fights, and death. Before you expand your cat count, expand your food buffer; a three-week surplus is the point where you can safely grow. It is always better to donate spare cats to NPCs for permanent upgrades than to keep mouths you cannot feed.
Room Stats Explained
Furniture does not decorate — it sets room stats, and room stats run the entire home layer. These are the four stats that matter and what each one actually controls.
| Room Stat | What It Does | Raise With | Priority |
|---|---|---|---|
| Comfort | Controls whether cats breed or fight. High Comfort causes cats to breed more often; low Comfort causes fights, injuries, and stress deaths. | Beds, cushions, scratch posts, spacious rooms | Critical — the base stat every room needs |
| Stimulation | The single most important breeding stat. Determines whether kittens inherit the HIGHER or LOWER parent stat for each attribute. High Stimulation = kittens take the best of both parents. | Toys, puzzles, mirrors, interactive furniture | Critical for breeding rooms — max this first |
| Mutation | Raises the chance cats develop spontaneous mutations overnight in that room. Powerful but risky — mutations can be negative. | Mutation-specific furniture pieces | Optional — use a dedicated mutation room, never your main breeding room |
| Health | Helps cats recover from diseases and injuries overnight. Contagious diseases spread in low-Health rooms. | Clean-type furniture, food bowls, plants | High for recovery/quarantine rooms |
If you remember one line from this guide, make it this: Stimulation decides whether kittens inherit the higher or lower parent stat. Two parents with a 7 and a 3 in Strength will produce a 7-Strength kitten in a high-Stimulation room and a 3-Strength kitten in a low-Stimulation room. Every piece of Stimulation furniture you find is worth more than it looks — hold on to all of it.
The 4-Cat Room Rule
Keep breeding rooms at exactly 4 cats. Every cat beyond 4 drops the room's Comfort, and dropping Comfort means fewer breeding attempts and more fights. Four cats = two potential pairs with full Comfort and maximum breeding frequency. Resist the urge to "just add one more good cat" — the fifth cat makes everyone worse.
Overcrowding is the most common home-layer mistake generally: too many cats in one room tanks Comfort, spikes stress, spreads disease, and turns your best bloodline into a fight club. When a room exceeds 4 cats, someone needs to move — to another room, to an adventure squad, or to an NPC as a donation. Speaking of which: kittens count too. Move them out before they grow.
Dedicated Room Setups
Once Frank's upgrades give you multiple rooms, give each room one job. Mixing jobs — breeding pairs housed with kittens, sick cats, and mutation experiments — is how colonies quietly collapse.
| Room | Occupants | Stat Focus | Notes |
|---|---|---|---|
| Breeding Room | Exactly 4 cats | Stimulation maxed first, Comfort second | Your two best breeding pairs with complementary stats and no shared family tree. Every cat beyond 4 drops Comfort, which tanks breeding frequency. Check the family tree before pairing anyone. |
| Nursery / Kitten Room | Kittens only | Comfort and Health | Never leave kittens in the same room as their parents — they will breed with family members once grown and create inbred kittens with stat penalties and disorders. Move kittens out as soon as they can be relocated. |
| Adventure Prep Room | Your active squad (3-4 cats) | Comfort, Health | Keeps your working cats happy and recovering between runs. Retire injured cats here instead of sending them out to die — a retired cat preserves its genes for the breeding pool. |
| Mutation Lab (Optional) | Disposable cats only | Mutation stacked as high as possible | Overnight mutation chances scale with the room's Mutation stat. Move any cat that rolls a desirable mutation into the breeding room to lock it in; donate the failures. Never put primary breeding stock in here. |
| Quarantine Corner | Sick cats, 1-2 max | Health maxed | Contagious diseases spread through shared rooms. Move sick cats out immediately, or donate/dismiss them if they are not worth the cure time. |
NPC Donations — The Correct Order
Spare cats are currency. Every NPC trades permanent upgrades for donated cats, and the order you invest in changes how fast your colony matures. This is the order that works:
| NPC | Gives | Donate | Priority | Why |
|---|---|---|---|---|
| Frank | House upgrades — extra rooms | Retired adult cats | 1st | More rooms are the foundation of everything: separate breeding, nursery, and quarantine spaces. Extra rooms give you direct control over who breeds with whom. Donate to Frank first, always. |
| Tink | Information upgrades — base stats, inbred status, family tree, orientation, compatibility | Kittens | 2nd | Tink's upgrades turn breeding from guessing into engineering. The family tree view alone prevents 90% of accidental inbreeding. Donate kittens to Tink early — information is worth more than the kitten. |
| Butch | Inventory space upgrades | Cats (check requirements) | 3rd | More storage for furniture, items, and consumables. Valuable once your house expansion is underway, but rooms and information come first. |
| Baby Jack | Furniture shop upgrades — better Comfort/Stimulation pieces | Items/cats per his requests | 4th | Better furniture raises your room stat ceilings. Upgrade once your breeding room exists and you can actually place the good furniture in it. |
Stray Management — Free Genetic Rescue
Strays appear outside your house regularly, and they are the most underrated resource in the game. Use them right and inbreeding almost never becomes a problem.
Always take strays in
Strays are unrelated to everyone in your clowder, which makes them the safest way to add fresh genetics. Breeding a stray into an established bloodline resets inbreeding risk for that line — they are your primary defense against genetic stagnation.
Screen before breeding
Check a stray's base stats before adding it to the breeding room. A stray with 6-7 in your target stat is a bloodline upgrade; a stray with all 3s is donation fodder for Frank or Tink. Either way it is useful — but know which it is before it breeds.
Watch for pre-existing mutations
Some strays arrive carrying mutations. Positive mutations from strays are free value — breed them into your lines immediately. Negative ones should never touch the breeding pool.
Gay strays are a feature, not a bug
Gay cats do not produce kittens directly, but each time they breed they raise the chance of gay strays appearing that inherit some of their stats and abilities. A high-stat gay cat can propagate its genetics through the stray pipeline instead of the nursery.
FAQ
Q: Which room stat should I invest in first?
Stimulation for the breeding room, Comfort everywhere else. Stimulation is the single most important breeding stat because it decides whether kittens inherit the higher or lower parent stat — maxing it means every litter gets the best of both parents. Comfort is the baseline that keeps cats breeding instead of fighting, so every room needs a floor of it. Mutation furniture is a specialist tool: powerful in a dedicated mutation room, dangerous anywhere near your main breeding stock. Health matters most for quarantine and recovery rooms.
Q: How do I stop accidental inbreeding overnight?
Three habits fix almost all of it. First, donate kittens to Tink until you unlock the family tree view — you cannot avoid related pairs you cannot see. Second, never leave grown kittens in the same room as their parents and relatives; move them to a nursery room or out of the house. Third, bring in strays regularly and assign icons to cats by bloodline branch, so any two cats sharing a room overnight are either unrelated or intentionally paired. Remember that even distant relations count as kin — the family tree, not your memory, is the source of truth.
Q: Should I retire injured cats or keep adventuring with them?
Retire them early. An injured cat on an adventure is a liability — one bad fight and it dies permanently, taking its genes with it. A retired cat resting in a high-Comfort, high-Health room recovers, stays available for breeding, and can later be donated to Frank or another NPC for permanent upgrades when its adventuring days are done. Treat every cat as two assets: a fighter now and a gene donor later. Losing both to one avoidable fight is the worst trade in the game.
Q: How many cats should my colony actually hold?
As many as your food surplus and rooms can support — and no more. The hard cap is food: 1 per cat per day, and a three-week buffer before you grow. The soft cap is room quality: if adding a cat pushes a room past 4 occupants, the whole room gets worse. A lean colony of 8-12 well-housed, well-fed cats outperforms a crowded colony of 20 in every measurable way. Donate the excess to NPCs — a donated cat is a permanent upgrade, a starving cat is nothing.
Last updated: July 18, 2026. Room stat effects, the 4-cat Comfort rule, and NPC donation trees verified against the current Mewgenics release build and community testing.