Nah, he can't bark or eat while he's holding it, so I bet he'd find that a pain.

[ Koromaru barks his agreement, and picks the knife up with his mouth only to walk it over to Minato's feet and nudge the blunt end of the handle against his knee. ]

I'll hang onto this one for you too, then?

[ Another bark, and Minato takes the knife. And sticks it in his pocket. ]