The Mouse Chew Toy is an uncommon toy in Adopt Me! that was previously obtainable from opening Small, Big, and Massive Gifts for 
70 199 or 499 respectively.
As of the 2021 Gift Refresh update, the Gifts were replaced with another set of items. It can now only be obtained through trading.
Usage
When interacted with, the player drops the Mouse Chew Toy and their equipped pet starts chewing on it. If a player does not have an equipped pet, a text will appear on the screen that states, "You need a pet to use this!".
A Player holding the Mouse Chew Toy
A Shiba Inu using the Mouse Chew Toy.