No experience with corvids, but I’ve had parrots and they fucking love dipping. They’ll pick dried fruits and such out of their mix, carry it over to their water, dunk, nibble, dunk, nibble, etc.

Usually it’s something dried that makes sense to reconstitute, but sometimes they’ll dip something like seeds just for the hell of it.

Closest thing to sauce I ever gave them was some yogurt, and usually they’d just eat it straight, but occasionally would drop some other food into it before eating it.

Pssh… call me when they’re dipping in McD Szechuan sauce. That’s the real sign of intelligence.