Well . . . the kitties seem to be winning the nightly kibble battle. If I see one that starts to leave the empty lower bowl, I "meow" very loudly so they hear it and then go out and show them where the bowl is. Enough cats now know this that should start to diffuse into the kitty ethernet.
I'm certain that the k00nnies will find the secret stash and there is a roll of fencing next to the ledge that they can use to climb. but given their weight, it's possible the maybe 12 to 10 gauge fence wire might cut their paws and of course claws are useless.
Once that happens and I am duly entertained, I have a couple of retaliatory moves in mind.