when and where can i use the key from ratthew in animal hospital roblox

The key from Ratthew is used in Room 5 , where you remove the cat poster to reveal a secret lock , then open it with the key. That unlocks a hidden clue tied to Ratthew’s lore, including a picture of Retina, his sister.

Where to use it

• Go to Room 5.
• Look for the cat poster.
• Rip/remove the poster to expose the secret lock.
• Use the key on that lock.

When you get it

• In the update/lore sequence, Ratthew gives you the key after the conversation finishes and he leaves you a note with it.

• Recent videos about the update and secret key were posted on June 25–26, 2026 , so this is part of the current Animal Hospital update content.

What it unlocks

• The lock reveals a hidden image connected to Retina , Ratthew’s sister.

• It’s part of the game’s secret lore rather than a normal treatment-room item.

TL;DR: Use Ratthew’s key in Room 5 behind the cat poster to open the secret lock.