Every night shift in Animal Hospital throws a mix of patient impostors and roaming hazards at you, and not all of them carry the same risk. Some can be waved off by closing a shutter, while others will hunt your patients, drain your sanity in seconds, or end a surgery in failure if you react the wrong way. The ranking below sorts the current roster by how dangerous each anomaly is and how hard it is to neutralize cleanly.
| Tier | Anomalies |
|---|---|
| S | Skinwalker, Surgery Tentacles |
| A | Death Ritual, Ghost, Bed Monster |
| B | Flesh Ceiling (Don’t Look Up), Fire, Head Knocker, Demon Cat / Camera Figure |
| C | Stalker, Translucent Man, Void Creatures (Wall Anomaly) |
| D | Slime, Reception patient anomalies (Three Eyes, Hollow Eyes, Big Teeth, Limb Spasms, and other shutter rejects) |
How this was ranked: anomalies are placed by the combined risk they pose to your patients and your sanity, plus how punishing a wrong reaction is. Threats that can kill a patient or chase you across the building sit higher than ones you simply ignore or reject. This ordering reflects the roster as of the late-June 2026 anomaly update, which added the Ghost.
S tier: the anomalies that lose you patients
The Skinwalker is the single biggest reason to verify every check-in. It spawns when an anomaly patient slips past you, then actively seeks out either you or a real patient to attack. You can stop it with a taser or gun, hold E from behind to pull it off a victim, or spam E to fight back if it grabs you, but every option costs time and risks sanity. Letting one wander unchecked can wipe out a patient outright.
Surgery Tentacles are just as deadly because the failure condition is hidden in your instincts. Purple tendrils appear over a patient on the operating table in Room 8, and you have to finish the surgery mini-game before the timer runs out. Shooting or tasing the tentacles kills the patient instantly, so the only correct response is to complete the procedure as normal and let the surgery clear them.
A tier: high-pressure threats with a strict method
Death Ritual is an emergency event that floats a patient above their bed inside red light and candles, with nearby tech glitching out. You have to beat the timer to reach the room and remove every candle, and each candle you pull drains your own sanity. Miss the window and the patient is gone.
The Ghost is the newest addition and earns its spot because it never truly leaves until you deal with it. It appears as a translucent white figure with large black eyes and a stitched mouth, dealing 2 sanity per tick on contact while toggling its own invisibility and opening or closing doors around the building. A door swinging on its own is a reliable warning that it is nearby, and it will drift toward you once you get close, visible or not.
There are two ways to handle it. To kill it, sneak up directly behind it while it is visible and hit it with the taser or the gun. The taser appears in the check-in room on Shift 3 and gives you a single shot, while the gun lies on the floor in the same room but has to be unlocked with Robux. Striking from any angle other than its back does nothing and makes it turn invisible immediately, though you keep your item if you miss.
If you cannot kill it, incapacitate it instead. The fire extinguisher on the wall to the right of the shop entrance forces the Ghost to stay visible, making it far easier to avoid or finish off. The other option is to lead it into an active fire, which knocks it unconscious and removes it as a threat, though you will likely take some sanity damage while luring it there. Picking up the Security class helps a lot here, since at higher levels it grants up to six taser uses and regenerates one per shift.
The Bed Monster rounds out this tier. It hides under a patient’s bed inside a transparent red zone, and stepping into that line lets it grab you for heavy sanity damage. Hold Maple Syrup and approach the red area to make it vanish, or simply hop over the bed to treat the patient without touching the line.
B tier: manageable hazards that punish carelessness
These anomalies will not end your run on their own, but ignoring the rules around them adds up fast. The Flesh Ceiling, also called Don’t Look Up, hangs in patient rooms and the CCTV room. The game flashes a warning, and as long as you keep your camera aimed down and finish your task, it leaves on its own. Look up and it grows while draining sanity.
| Anomaly | How to handle it |
|---|---|
| Fire | Grab the fire extinguisher beside the shop doors and put out the burning room. |
| Head Knocker | Give it coffee at the second check-in window, or close the shutter as it rears back; stopping it without coffee costs heavy sanity. |
| Demon Cat / Camera Figure | Appears only on cameras with red eyes and a zoom-in; exit the feed quickly or avoid cams to skip the roughly 20 sanity jumpscare. |
C tier: minor sanity drains you can walk away from
The Stalker is a towering shadow rabbit that lurks around corners. Staring at it costs sanity, but glancing away keeps the loss small, so you just keep moving past it. The Translucent Man blends into the wall tiles of a patient room and chases you only if you lock eyes with it; running to the lobby makes it vanish in a puff of smoke.
Void Creatures, sometimes seen as a Wall Anomaly, appear in clusters and will chase you, drain sanity, and steal items if touched. Aggro them and run, and they disperse into black smoke after a short while. None of these can kill a patient, which keeps them low on the list.
D tier: close the shutter and move on
The bottom tier covers the reception impostors and the cleanup chore. Patient anomalies such as three glowing eyes, hollow eyes, oversized teeth, twitching limbs, stretched limbs on camera, a patient staring into the lens, or a mismatched photo all share one fix. Confirm the sign, lower the shutter, and the impostor leaves before it can become a Skinwalker.
Slime sits here too. A passing patient occasionally leaves bright green globs on the floor, and clearing each one with a hold of E removes it entirely. There is no chase, no timer, and no damage, which makes it the least threatening thing you will deal with all shift.
Use this ranking to decide where to spend your attention. The S and A tier threats are the ones worth keeping the taser, fire extinguisher, and a stocked inventory ready for, while the lower tiers mostly reward steady habits like checking the photo, glancing at the cameras, and never staring at something you were told not to look at.
