Animal Hospital Surgery Guide — How to Handle Critical Patients & Treatments

Animal Hospital Surgery Guide

Treating patients is one of your core duties in Animal Hospital. While screening for anomalies at reception gets the most attention, the treatment room and surgery procedures are equally important. This guide covers how to diagnose patients, handle critical cases, perform surgeries, and manage the treatment workflow.

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Understanding Patient Treatment

After patients pass through reception screening (confirmed as non-anomalous), they need to be treated in the treatment rooms. The treatment process involves:

1. Admit the patient — After screening, send them to the treatment area
2. Diagnose the illness — Use the room computer for DNA analysis
3. Apply treatment — Give the correct medicine or procedure
4. Complete treatment — The patient recovers and leaves

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How to Diagnose Patients

Step 1: DNA Analysis

Each treatment room has a computer terminal for diagnosing patient illnesses:

1. Place the patient in the treatment area
2. Interact with the computer (press E)
3. Select DNA Analysis or Diagnose
4. Wait for the analysis to complete (approximately 4.5–9 seconds depending on upgrades)
5. The computer displays the illness type and required treatment

Step 2: Read the Diagnosis

The diagnosis tells you:

• What illness the animal has (e.g., infection, injury, poisoning)
• What treatment is needed (e.g., specific medicine, surgery procedure)
• Time remaining — A timer starts for the treatment

Recommended Upgrade

This upgrade is one of the best early purchases — faster diagnosis means more patients treated per shift.

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How to Handle Critical Patients

Critical patients are marked with visual indicators and require immediate attention:

Signs of a Critical Patient

• Urgent markers appear near the patient (red indicators or warnings)
• The treatment timer is shorter than normal
• If untreated, the patient dies and you lose Sanity

Treatment Protocol for Critical Patients

1. Prioritize critical patients over non-critical ones
2. Rush to the treatment room immediately
3. Run DNA Analysis as fast as possible
4. Apply the correct treatment before the timer expires
5. Wrong treatments result in Sanity drain

What Happens If You Fail?

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The Surgery Room — Special Procedures

Some patients require surgery rather than standard treatment. The surgery room is where these procedures happen.

Surgery Mechanics

• Surgery has a timer — you must complete it before time runs out
• The Tendril monster can appear during surgery, adding pressure
• Complete the surgery procedure steps in order
• If the Tendril appears, you must deal with it while completing surgery

Dealing With the Tendril During Surgery

The Tendril is a monster that appears in the surgery room:

The Tendril has a Medium danger level — it drains Sanity but won't instantly kill you. Prioritize completing the surgery.

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Common Animal Problems & Treatments

Players frequently ask about the different illnesses animals can have. Here are the common categories:

Illness Types

How to Treat Animals Properly

1. Always run DNA Analysis first — Never guess the treatment
2. Apply the exact treatment shown — Wrong treatments penalize you
3. Monitor the timer — Critical patients have shorter windows
4. Treat multiple patients efficiently — Use the "Extra Check-In Window" upgrade to handle parallel cases

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Best Upgrades for Treatment Efficiency

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Treatment Tips by Class

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FAQ

What is the animal's problem when they have to get surgery?

Animals needing surgery have conditions diagnosed by the room computer's DNA Analysis. The computer tells you the exact illness and required treatment — always check the diagnosis before treating.

How to handle critical patients in Animal Hospital?

Prioritize critical patients, run DNA Analysis immediately, and apply the correct treatment before the timer expires. Critical patients have shorter timers and harsher penalties for failure.

How to give eye ointment to the ceiling monster?

The ceiling monster (Don't Look Up / Flesh Ceiling) is countered with Eye Drops, not regular treatment items. Find Eye Drops in the hospital and use them when the ceiling monster appears.

What does the animal's problem mean when they need surgery?

It means the animal requires a surgical procedure in the surgery room rather than standard medicine. Run DNA Analysis, follow the surgery steps, and complete before the timer — watch out for the Tendril monster.

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For item details and upgrade costs, see our Complete Items Guide. For patient screening before treatment, see our How to Play Guide.

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Last updated: July 6, 2026 | Sources: Community reports, in-game testing, Discord discussions.