He is a good boy. So good in fact that when his master asked him to turn into a boomerang as a joke, he did it.

Now he is forever a throwable dog.

You can use him as a statue or a paperweight. He doesn’t move his body unless thrown. He always comes back. 

It is every dogs dream. You throw. He bring back.

The boomerang is a ranged weapon, and any creature proficient with the javelin is also proficient with this weapon.

On a miss, a boomerang returns to the thrower's hand.

Notes: Damage: Bludgeoning, Damage, Combat, Sentient, Range