There's more than enough to go around to those who are patient and polite.
I'm not sure why some have a hard time using food to "train" dogs. It's such a helpful tool to use; be it a motivator, a reward, or a distraction. It speeds up teaching cues and also provides ample training opportunities, especially one very important issue that ALL dogs need to learn to be SAFE around humans and other dogs...RESOURCE GUARDING. Trading whatever they have for a treat or classically conditioning the approach of other dogs or people near your valued possession (be it toys, food, people, spaces...) = MORE TREATS for you!