Chickens are pretty smart when it comes to their own nutritional requirements. they usually don't eat as much if they eat high quality food. But also, just like kids and cotton candy, they can make them selves sick or unhealthy from eating just corn or scratch. That why is always better to limit their treats to 10%.I have watched YouTube videos from Justin Rhodes and Edible Acres. They feed their chickens lots of extra greens and restaurant food. That’s why I thought it was ok.