Animal Hospital Wiki & Guides

What is Animal Hospital (Anomaly)?

Animal Hospital (Anomaly) is a multiplayer survival-horror game on Roblox, released on May 10, 2026 by the Animal Anomaly group (developer Roytt). You work night shifts at a veterinary hospital: animals queue at the check-in window, you decide which ones are real patients, you diagnose and treat the real ones, and you survive whatever else is in the building with you. It went from 57K concurrent players in its first month to the #1 most-played game on Roblox by early July.

The catch is that some of the animals in the queue are not animals. Anomalies are entities disguised as patients, and letting one through the window usually triggers a Death Ritual, spawns a monster, or turns it into a Mimic that attacks patients and staff. There are nineteen, and no single check catches all of them.

There is also no health bar. Sanity is the stat that kills you— at zero you die, and a teammate can only revive you with a $1,000 Teddy Bear; you can't use one on yourself. The other hard limit is patient deaths: three fail the run.

And there is no ending. Shifts 1–4 hand you the mechanics one at a time, story beats run through Shift 6, Liz's questline spans roughly Shifts 11–21, and past that it is endless survival at rising difficulty. See does Animal Hospital have an ending for the full structure and the "secret ending" rumor, checked.

How a shift works in Animal Hospital

A night at Animal Hospital always runs the same five phases: check-in at the window, the reject-or-admit call, diagnose and treat, the ~35-second recovery watch, and surviving whatever event the night throws in. Each phase has its own way of ending a run, and the wrong-treatment and check-in mistakes are the two that punish beginners hardest. Read the step-by-step walkthrough of all five phases before your first shift.

The three ways to catch an anomaly

Each of the 19 anomalies only gives itself away through one of three channels, and the split is uneven: 8 are visible in person, 3 only on the printed photo, and 8— the largest group — only on the security cameras. That last number is the whole argument for checking CCTV on every patient: "they looked fine at the window" clears less than half the list. A single patient can also stack several anomaly traits at once.

The nine monsters — and the four you hand an item instead of shooting

Anomalies queue at the window; monsters are already inside. Nine of them roam the hospital, and the single most useful thing to know before your first encounter is that most of them are not meant to be killed. Four are resolved by handing over an item, two have no combat answer at all, and only three are actually weapon problems. Reaching for the taser by reflex is how new players lose sanity they never needed to lose.

Two of these scale with how many people are on the shift: bare-handed damage on a Mimic is slow solo but much quicker in a group, and Hiders spawn in groups of up to six.

Sanity is the real health bar

Everything above converts into the same currency: you start at 61% and the shift spends it on your behalf. Know which mistakes are expensive and which refills are cheap before you need them.

The two worst single hits in the game are both −20 and both fully avoidable. Misidentifying a normal animal costs −15 while tasing a confirmed anomaly pays +2 — the whole argument for checking all three channels. The shop's best refill is the chocolate bar by a wide margin.

The full table of every documented gain and loss is in the beginner's guide. Several classes change this arithmetic outright: the Psychologist starts at 100% and doubles every sanity effect in both directions, while the Secretary and Doctor pay you 1 sanity for each patient you check in or cure. Comparison on the classes page.