Ni's Dogs

Ni summons two dog-like creatures in Naruto Shippūden 3: Inheritors of the Will of Fire. They both possess two spear-like weapons on their backs that they can stretch out to attack the enemy. They first appear attacking Naruto Uzumaki when he tries to save Sai. Both were killed when Shino Aburame used his Kikaichū to devour the chakra from the dogs.