I would love to hear more opinions about this from other experienced chicken carers (or what ever we call ourselves). I moved into a new home 2 years ago. There was an elaborate dog house with heated concrete floor outside the main pen area. We converted it to our chicken coop. We don't heat the concrete, but i use this area for my hanging feeder and water. And I have been giving them treats directly on that concrete ground since. Just recently, my husband announced that he thought it was cruel to the chickens to make them peck on the concrete. They never seems bothered by it, and I've never seen any evidence that it is hurting or damaging their beaks, but I am open to hear more opinions.