Animal Hospital Anomalies Guide
Every anomaly in Animal Hospital, how to spot them, and how to counter each threat.
By AnimalHospital.blog Team
Last updated:
16 Anomaly Tells — Quick Reference
Wiki-verified tells across three detection layers. Always check all three before admitting anyone — a patient can carry more than one tell at once.
Voice clue: Crooked Face, Three Eyes, and Unnatural Facial Appearance all guarantee a low, distorted voice at the window.
Appearance Tells6 tells
Visible with the naked eye at the check-in window — 6 confirmed.
| Tell | How to Spot It | Response |
|---|---|---|
| Crooked Face (Mismatched Eyes & Sharp Teeth) | Crooked sharp-teeth smile with large mismatched eyes set high on the face. Always carries a distorted voice. | Reject at the window |
| Three Eyes | Three mismatched glowing red eyes; the head follows you. Always carries a distorted voice. | Reject at the window |
| Unnatural Facial Appearance (Smiling / X-rayed) | Realistic eyes with a drawn-on smile, or small circular eyes with realistic teeth. Always carries a distorted voice. | Reject at the window |
| Staring | Rotates its head up to ~60° to stare at your camera or a player. Admitting one guarantees a Mimic during recovery. | Reject at the window |
| Hollow Face | Hollow dark eyes, hunched posture, constant twitching. Admitting one guarantees a death ritual during recovery — stay in the room with it. | Reject (or stay with it if admitted) |
| Twitching | Jerks in both arms and head, sometimes with an elongated neck. May only appear on cameras. Guarantees a Mimic if admitted. | Reject at the window |
Photo Tells2 tells
Only visible in the developed polaroid — 2 confirmed.
| Tell | How to Spot It | Response |
|---|---|---|
| Incorrect Photo | Eyes, ears, mouth, or overall face change between the patient and their photo. Any photo irregularity is always an anomaly. | Reject at the window |
| Static Photo | The photo comes out static and grainy. A static-only patient faints when shot but still counts as an anomaly — admitting one starts a death ritual. | Close the shutter (don't shoot) |
CCTV Tells8 tells
Only visible on the security cameras — 8 confirmed. Check every feed before admitting.
| Tell | How to Spot It | Response |
|---|---|---|
| Black Eyes | A black bar covers the patient's face with realistic eyes staring out from it. | Reject at the window |
| Unnatural Body (“Boneless”) | Heavily stretched, distorted body that changes shape each time you reopen the feed. | Reject at the window |
| Staring at Cameras | The patient looks directly into the CCTV camera at all times, even while walking. | Reject at the window |
| Void / Black | The patient appears entirely black on the camera feed. | Reject at the window |
| Camera Twitching | The patient twitches on camera footage only — never in person. | Reject at the window |
| Disguised Mimic (formerly Shapeshifter) | Shows as a Mimic on camera once it reaches check-in. Use the lobby camera's side view to catch it. | Reject at the window |
| Mismatching Ears | Different ears or horns on camera than at the window. | Reject at the window |
| Mismatching Face | A different face on camera than at the window. Place a Deployable Camera in the office to catch it clearly. | Reject at the window |
Visual Signs
Check the patient's appearance at the front desk window
Three Eyes
EasyVisual - Front Desk
- Patient has three eyes instead of two
⚠️ Counter Protocol
Close shutters immediately
Hollow Eyes
EasyVisual - Front Desk
- Eyes are completely black or empty sockets
⚠️ Counter Protocol
Close shutters immediately
Sharp Teeth
EasyVisual - Front Desk
- Unnaturally sharp or pointed teeth
⚠️ Counter Protocol
Close shutters immediately
Wide Grin
EasyVisual - Front Desk
- Unnaturally wide smile extending beyond normal face
⚠️ Counter Protocol
Close shutters immediately
Twitching
MediumVisual - Front Desk
- Erratic body twitching or head movements
⚠️ Counter Protocol
Close shutters immediately
Deep Voice
MediumAudio - Front Desk
- Speaking in a deep, gravelly voice
⚠️ Counter Protocol
Close shutters immediately
Different Eyes
HardVisual - Front Desk
- Eye color, shape, or size differs from patient photo
⚠️ Counter Protocol
Close shutters immediately
Different Ears
HardVisual - Front Desk
- Ear shape or size doesn't match the patient's species
⚠️ Counter Protocol
Close shutters immediately
Photo Signs
Check the patient photo against their appearance
Distorted Photo
EasyPhoto Check
- Photo appears distorted, stretched, or corrupted
⚠️ Counter Protocol
Close shutters immediately
Wrong Species
MediumPhoto Check
- Photo shows a different animal species than the patient
⚠️ Counter Protocol
Close shutters immediately
Empty Photo
MediumPhoto Check
- Photo shows no animal or an empty background
⚠️ Counter Protocol
Close shutters immediately
Black Eyes Photo
HardPhoto Check
- Solid black rectangle covering face with drawn-on eyes
⚠️ Counter Protocol
Close shutters immediately
Incorrect Photo
MediumPhoto Check
- Photo shows a different patient entirely
⚠️ Counter Protocol
Close shutters and flag the mismatch
CCTV Signs
Monitor the waiting room via security cameras
Wrong Pose
MediumCCTV Check
- Patient appears in a different pose on CCTV than in person
⚠️ Counter Protocol
Close shutters immediately
Different Species
MediumCCTV Check
- Patient appears as different species on camera
⚠️ Counter Protocol
Close shutters immediately
Camera Figure
HardCCTV Check
- Shadowy humanoid figure standing in broken camera feed
⚠️ Counter Protocol
Repair camera or avoid the area
Static Figure
HardCCTV Check
- Patient appears frozen or static on camera but moving in person
⚠️ Counter Protocol
Close shutters immediately
Scanner / Tool Signs
Use the Scanner item (added in Harlow's Update) for additional detection
Scanner Red
EasyScanner Tool
- Scanner light turns red when pointed at patient
⚠️ Counter Protocol
Close shutters and reject patient
Scanner Green Normal
EasyScanner Tool
- Scanner light stays green — patient is safe
⚠️ Counter Protocol
Proceed with check-in normally
Baby & Tiny Anomalies
Miniature threats added in the Hazmat Team update. Every tiny visitor is an anomaly — never a real patient.
Tiny Mimic (Hazmat Update)
Added in the Hazmat Team Arrives July 2026 update: a small shapeshifting entity that hides inside medkit boxes, drawers, and supply cabinets. Disguises itself as a regular item.
Counter
Always check item boxes carefully before looting. If the box shakes or makes noise, use Decontamination Spray on it before opening.
Tiny Anomaly (Hazmat Update)
A miniature patient (commonly a pink rabbit with three eyes) that checks in at reception. Currently all tiny visitors are anomalies — none are legitimate patients.
Counter
Close the shutters to refuse service. If it gets inside, it chases and bites the nearest player, draining sanity. Use a taser or gun to defeat it quickly.
Rule of thumb: if a patient is shockingly small, it is the baby anomaly. Snap a photo and confirm the three eyes before the shutters go up — a false alarm is always cheaper than a Tiny Anomaly loose in the ward.
Special Monsters
Unique threats that require specific countermeasures beyond the standard shutters.
Head Banger
A purple bear-like patient that smashes its head against the reception window, blocking the shutters from closing.
Counter
Brew a coffee, take two sips, and bring it to the window. Use the E prompt to offer the coffee. The Head Banger drinks it and leaves peacefully.
Bed Monster
Long black arms reach out from underneath hospital beds, threatening to drag patients or players under.
Counter
Watch for black arms near bed areas. Stay out of the red danger zone. Feed it Maple Syrup to make it disappear safely.
Demon Cat
A demonic cat that appears at the end of hallways when viewing CCTV, causing instant sanity loss.
Counter
Keep CCTV viewing sessions short. If you see it, leave the camera immediately. The 20 sanity loss is unavoidable on sight.
Stalker (Disguised)
New behavior added in Harlow's Update: the Stalker can now appear at the check-in window disguised as a normal patient.
Counter
Photograph the suspicious patient. The Stalker will flee when photographed. Avoid eye contact to prevent sanity drain.
Slimebert (Hazmat Update)
Added in the Hazmat Team Arrives July 2026 update: a neon green oozing anomaly disguised in protective gear.
Counter
Use the Scanner tool or Hazmat Decontamination spray at the window. Do not open shutters until decontaminated.
Ceiling Eyes
Creepy glowing eyes that manifest on examination room ceilings, causing rapid Sanity drain if looked at directly.
Counter
Avoid direct eye contact. Look down at the floor and apply Eye Drops to restore lost Sanity immediately.
Tiny Mimic (Hazmat Update)
Added in the Hazmat Team Arrives July 2026 update: a small shapeshifting entity that hides inside medkit boxes, drawers, and supply cabinets. Disguises itself as a regular item.
Counter
Always check item boxes carefully before looting. If the box shakes or makes noise, use Decontamination Spray on it before opening.
Tiny Anomaly (Hazmat Update)
A miniature patient (commonly a pink rabbit with three eyes) that checks in at reception. Currently all tiny visitors are anomalies — none are legitimate patients.
Counter
Close the shutters to refuse service. If it gets inside, it chases and bites the nearest player, draining sanity. Use a taser or gun to defeat it quickly.
Light Flickers: A Warning Sign
Lighting glitches are one of the game's environmental cues that something is wrong.
- Flickering or dying lights usually mean an anomaly is active nearby or an emergency event is about to trigger. Treat it as a "pause and look" signal.
- What to do: stop the admit flow, do a quick visual sweep of your surroundings, then re-check the CCTV feeds before you open the shutters.
- Important: flickering lights do not tell you which anomaly is present — they only tell you one is near. You still need the full three-step check (visual → photo → CCTV) to confirm the patient at the window.
- Widespread blackouts (whole-ward darkness) are tied to special events — check our event guides for how to survive a full power-down.
Video Guide
Watch anomalies in action and see how experienced players handle each threat.
Animal Hospital (Anomaly) Full Walkthrough
Josh Plays
All Anomalies Explained in Roblox Animal Hospital
FrankANchaos
Spotting Pink Patient Anomalies?
Learn how to distinguish between genuine pink animal patients and hostile disguised anomalies.
Beginner Tips
- Never rush the check-in process. Watch each patient for at least 4-5 seconds before stamping.
- Always take a photo and wait for it to fully develop before examining. Picking up a cursed photo early costs 10 sanity.
- Check CCTV cameras on every patient. Some anomalies only appear on camera and pass all other checks.
- Keep a taser in your inventory at all times. Tasers remove anomalies and restore +2 sanity on hit.
- Use the fixed scan order: Visual -> Photo -> CCTV. Never skip a step.
- Close the shutters if you are unsure. A false alarm is better than letting an anomaly inside.
- If a Skinwalker gets in, use a taser or gun immediately before it harms patients.
- Stock up on coffee before each shift. Coffee restores sanity and is essential for late-shift survival.
- The Scanner (new in Harlow's Update) instantly tells you if a patient is an anomaly — green = safe, red = danger.
- Use the Deployable Camera (new in Harlow's Update) to place a CCTV camera anywhere in the hospital for better coverage.
- Hire Sam NPC ($250 cash) after the slime event to automatically clean slime and neutralize minor threats for 3 shifts.
- The Journal System tracks every anomaly and NPC you encounter — full completion rewards bonus Animal Coins.
- Watch for Tiny Mimics hiding in supply boxes. Shake or make noise = mimic inside. Use Decontamination Spray first.
- Protective Gear from the lobby reduces slime Sanity drain. Always equip it before Hazmat-heavy shifts.
Frequently Asked Questions
How do I spot anomalies in Animal Hospital?
How many anomalies are in Animal Hospital?
What is the hardest anomaly to spot?
What happens if I let an anomaly inside?
Can I kill an anomaly that got inside?
What is the correct scan order?
What is the baby anomaly in Animal Hospital?
How do I stop the baby anomaly in Animal Hospital?
🔗 Continue Reading & Related Guides
Slimebert Anomaly Guide→
How to survive the giant slime anomaly.
Stalker Anomaly Guide→
Survive the stealth Stalker entity lurking in hospital hallways.
Ghost Guide→
How to deal with the Ghost entity spawned after patient death.
Enemies & Monsters→
Complete hostile entity roster and weapon counters.
Masked Figure→
Mysterious entity encounters and survival tips.
Bed Monster→
The room hazard under patient beds.
Skinwalker→
The only killable anomaly.
Mass of Eyes→
The gaze-draining environmental anomaly.
Camera Figure→
The CCTV-only entity.
Hiders→
Wall anomalies revealed by flashlight.
Death Ritual Event→
Extinguish candles to stop the levitating patient.
Don't Look Up (Flesh Ceiling)→
The ceiling flesh-mass hazard — keep your camera down.