Tool

Fire Extinguisher

Fires white spheres that extinguish fires in rooms or on burning patients (avoids needing Ointment afterward). Can also be used on Hiders, Ghosts, Anomalies, and slime puddles per the Items overview page. Consumes Charge on use; returning it to its spawn point recharges it at 1% per 2 seconds.

Fire Extinguisher is a multi-purpose tool in Animal Hospital (Anomaly), free to pick up starting Shift 3 next to the Supplies Shop. Its core job is putting out fires — on a burning patient, using it avoids the follow-up Ointment treatment you'd otherwise need — but it's also documented as usable against Hiders, Ghosts, other anomalies, and Slime puddles. It runs on a Charge meter that depletes with use and recharges at 1% every 2 seconds once returned to its spawn point.

Effect & Details

Price: Free, available from the start of Shift 3, found to the right of the Supplies Shop.

Tips & Strategy

Use it on burning patients to skip needing Ointment afterward.
It's also a legitimate combat/utility tool against Hiders, Ghosts, and other anomalies, plus a fast way to clean up Slime.
Watch your Charge meter — it depletes with use, and you'll need to return it to its spawn point to recharge at 1% every 2 seconds.
It's free starting Shift 3, so there's no reason not to pick one up as soon as it's available.