The Blue Rubber Bone is an item in Nintendogs that falls under the category of "Sports" in the Supplies. It is no different from the other three Rubber Bones besides color. It is blue with dark blue "Nintendogs" text engraved on it.
DS: "This toy is great for strengthening a puppy's jaw and helping it relieve stress."
- Even though the Blue Rubber Bone claims to be made of rubber, when a dog grabs it, it sounds as though it is grabbing crystal.
- In addition to sounds, the bone makes a spring-like sound upon hitting something.