Animal Hospital Monster Compendium: A Guide to Dealing with Roaming Enemies and Monsters

The first type is the anomaly that waits at the reception window disguised as a pet. They will line up for registration, and you need to screen them one by one. If you spot a flaw, drop the red shutter to reject them. These targets do not actively chase you; they are 'static' judgment tasks.

The second type, the focus of this page, does not line up or disguise itself; they roam directly through clinic hallways, patient rooms, and CCTV. The English community usually refers to these moving creatures as Animal Hospital enemies or monsters to distinguish them from window anomalies. They are 'dynamic' reaction tasks: after seeing a tell, you must take the correct action within seconds.

Even worse, these two types are not entirely separate—if you fail to screen them at the front desk and admit a disguised anomaly, it may reveal its true form inside the clinic, becoming the most unique of the roaming monsters: the Skinwalker. In other words, if you don't guard the window well, you'll have one more biting problem in the hallway.

The Bed Monster is one of the first Animal Hospital monsters beginners will encounter and the easiest to get caught by. It is a black figure with a pair of glowing red eyes that usually hides under a patient bed. The identification method is very direct: the bed it occupies will be marked by a red box—if you see a red box, it means there is something under that bed.

You cannot approach it empty-handed. The correct way is to hold Maple Syrup and walk toward the bed; syrup is its weakness, and you can deal with it once you get close. If you approach empty-handed or with the wrong item, it will grab you.

The Sanity penalty is split into two stages: you lose 10 Sanity the moment you are grabbed; if you fail to escape in time and are held down, you will continue to lose Sanity at a rate of about 5 to 6 points every 2 seconds. Therefore, once you make a mistake, your top priority is to break free as quickly as possible and don't let it drain your Sanity bit by bit.

The Stalker is nicknamed "Hey Diva" by the community because of how it greets you. It is an elongated, twisted black rabbit with a grinning face full of sharp teeth. It belongs to the typical category of Animal Hospital monsters where "it's fine if you don't look at it, but trouble starts when you make eye contact."

There are only two rules for dealing with it: do not stare directly at it, and keep moving—don't stand still. Move your gaze away from it and continue on your path, and it won't be able to do anything to you.

Once you look directly at it, you will lose 10 Sanity. The most common mistake for beginners is to "check where it is" out of curiosity or panic, which is exactly what it wants. Remember: sense its position with your peripheral vision and don't center your camera on it.

The Mass of Eyes is also called "Don't Look Up" by players based on the on-screen prompt. It is a mass of eyeballs and flesh attached to the ceiling. When it appears, a prominent "DON'T LOOK UP" warning will pop up on your screen.

Its mechanics are similar to the Stalker, with the difference being that the threat comes from above. As long as you keep your camera aimed low and walk while looking straight ahead or at the floor, you can pass safely beneath it.

If you look up at it, your Sanity will drain at a rate of 2 to 5 points every 0.5 seconds—the longer you look up, the faster it drains. Seeing the warning and immediately looking down is the only correct solution; don't let curiosity get the better of you at this moment.

Hiders, also known as Wall Anomaly, usually appear in groups of 2 to 5 and look like clusters of black figures. The trouble with them isn't that they kill you instantly, but that they steal your items—and those items (maple syrup, coffee, etc.) are often your lifelines for dealing with other monsters.

Dealing with them is simple: Run. They will fade away on their own after about 5 to 6 seconds, so all you need to do is keep your distance and outlast those few seconds.

If you don't run and get attacked, you will lose 10 Sanity. For beginners, the indirect loss caused by having your items stolen is sometimes more fatal than those 10 points, so don't get greedy or try to fight when facing groups of Hiders; retreating is the best policy.

The Skinwalker is the most unique type of Animal Hospital monster in the entire mechanic because it doesn't spawn out of thin air—it transforms from an 'anomaly disguised as a patient' that you admitted. In other words, if you don't screen them well at the front desk and let an anomaly into the clinic as a real pet, it might reveal its true form inside: a wide-open mouth full of sharp teeth.

This is also one of the few targets that you can, and should, use weapons on. The correct way to fight is to attack from behind; if you get grabbed, mash E to break free. Both the taser and the gun are effective against the Skinwalker, which is the opposite of most other monsters.

It drains 6 Sanity for every bite. Since it stems from your mistake at the front desk, the best 'countermeasure' actually happens before admission—guard the reception window well and don't let disguised anomalies in, and you can reduce the appearance of Skinwalkers at the source.

The Head Banger has hollow eyes and starts appearing around Shift 2. Its signature behavior is repeatedly slamming into the second registration/reception window, making a thumping sound—once you hear that, you know who it is.

What it wants is quite 'down-to-earth'—coffee. Handing it a cup of coffee will calm it down and send it on its way, with zero Sanity loss.

But if you don't give it coffee and try to chase it away directly, the cost is very high: you will lose 20 Sanity in one go. This is one of the heaviest single penalties among all monsters, so beginners must keep coffee ready in advance; don't wait until it's banging on your door to scramble.

The Surgery Tendril appears in Operating Room 8: a burst of purple tentacles will suddenly erupt, giving you about 45 seconds to deal with it. Its danger doesn't lie in draining your Sanity, but in directly endangering the patient on the operating table.

The way to deal with it is to honestly complete the surgery mini-game. There is one iron rule here: absolutely do not use the taser or gun on it—weapons only work on the Skinwalker; firing at the Surgery Tendril will kill your patient on the spot, which is equivalent to failing the mission yourself.

If you fail to complete the process within 45 seconds, the result is also patient death. So don't panic when you encounter it, and definitely don't instinctively reach for your weapon; focusing on quickly completing the mini-game is the only correct solution.

The Camera Figure is a black, cat-like shape with red dotted eyes. It won't block you directly in the hallway, but will appear in the feed of a broken CCTV, constantly zooming in and approaching the lens.

The key to dealing with it is one word—fast: before it zooms in right to your face, quickly switch to another camera feed or just turn off that signal entirely.

If you let it finish zooming in, it will trigger a jumpscare, draining 20 Sanity at once. Keep your hands fast and your heart steady when checking CCTV; don't stare blankly at the same broken feed.