This update: in-game mechanics cross-checked against community wikis and player reports
Hollow Face anomaly โ quick reference
Channel
In person
Where to check
Look at the patient at the window
What you'll see
Deep, pitch-black hollow eyes with no visible pupils
Constant twitching
Hunched, slouched posture
How to confirm
Per community field testing, a patient idling with a hunched stance is an anomaly essentially every time.
If you let it in
Hollow Face always triggers a Death Ritual during recovery. The correct play is simple: just shut the window on it. Rejecting it doesn't cost you anything on your end-of-shift results, so there's no reason to gamble on treating it.
How to spot the Animal Hospital Hollow Face anomaly
The hunched posture alone is worth memorizing as a standalone signal โ per community field testing, a patient idling with a hunched, slouched stance is a Mimic or anomaly essentially every time, independent of any other tell.
Why this one needs your own eyes
Hollow Face is on the cheapest channel there is โ you catch it by looking at the patient, with no tool and no walk to the monitors. That is true of only 8 of the 19 anomalies in the game, so treat the free ones as the exception rather than the rule.
Check
Catches
What skipping it costs you
Naked eye โ this one
8 of 19
8 anomalies you will never see
CCTV
8 of 19
8 anomalies you will never see
Polaroid
3 of 19
3 anomalies you will never see
One patient can carry more than one of these at once, so a clean naked-eye read is not a clean bill of health.
What happens if you let Hollow Face into the hospital
Hollow Face always triggers a Death Ritual during recovery. The correct play is simple: just shut the window on it. Rejecting it doesn't cost you anything on your end-of-shift results, so there's no reason to gamble on treating it.
You have spotted it โ now what
You are at the check-in window with the patient in front of you, which shapes the answer: the shutter is already within reach, so refusing is the cheapest move available โ it costs no sanity and no ammunition.
1
Refuse it. Shutting the window costs nothing and ends the problem. It does not hurt your shift score, and it is always available.
2
Or put it down. A confirmed anomaly can be tased or shot, and doing so is worth +2 sanity. A wrong treatment also kills one with no sanity penalty โ it only lowers the end-of-shift reward.
3
What it costs to guess. Tasing or shooting a normal animal by mistake is โ15 sanity, nearly a quarter of the 61 you start with. That gap is the whole reason to confirm before acting rather than acting on a hunch.
An anomaly cannot be knocked out the way a normal patient can, so "it fainted, it must be fine" is not a test. Neither is slime on the floor โ patients drip it too.
The other 7 you are checking for at the same time
Once you are already looking through your own eyes, these cost you nothing extra to rule out. Knowing them as a set is what turns the check from a habit into a decision.
Big eyes with dark pupils, heavy under-eye bags, and a grin that looks painted on rather than expressed. It speaks in a low, distorted voice โ noticeably off from a normal patient's tone.
Three misplaced, glowing red eyes replace the normal pair. Look closely and you can sometimes still make out the original two eyes underneath the extra set.
A warped, tilted grin with sharp teeth, paired with mismatched eyes that sit visibly too high on the face โ the proportions are just wrong in a way a normal patient's face never is.
Small, wide, round eyes with black pupils, combined with teeth that look unsettlingly real โ almost too anatomically correct compared to the game's normal patient models.
Its head tracks you โ or a random target in the room โ constantly. In person the tracking is limited to roughly 60ยฐ, but on CCTV there's no limit at all, so the head can swivel further than a real neck should allow.
Spasming arms or head, a stretched neck, and a hunched back. Sometimes the twitching is only visible when you check the camera feed rather than looking at the patient directly.
The patient is extremely small โ far below any normal patient model โ and speaks with a very high-pitched voice. Its only documented look so far is a pink bunny with a short tail and three glowing red eyes.
See every anomaly at once
All 19 anomalies grouped by channel, plus the interactive identifier tool.
Deep, pitch-black hollow eyes with no visible pupils, constant twitching, and a hunched, slouched posture. The primary way to catch it is checking the patient in person.
Can you see the Hollow Face anomaly with the naked eye?
Yes โ this is one of the 8 anomalies you can catch just by looking at the patient at the window, no equipment needed.
What happens if I let a Hollow Face patient in?
Hollow Face always triggers a Death Ritual during recovery. The correct play is simple: just shut the window on it. Rejecting it doesn't cost you anything on your end-of-shift results, so there's no reason to gamble on treating it.
Verified against community data. Last checked: July 26, 2026.