Refried beans make a good "punishment" dog food for bad puppies.
Bio dogs can eat eggs and rice, too, so they're not totally off limits. Plain chunks of meat in a bowl work, dry cereal (cocoa puffs have the look if you can stomach them), and soup is always good because you've got to work for it.
But remember pups don't have cheeks like we do, you've got to mindfully eat like a pup. Hope this helps!
*scratches*