As much as I love my friend @drumstick diva I have to disagree with her on this. Watch a broody hen with her chicks when she takes them out into the big world a few days after hatching. She's not examining every food they pick up. She's not peeling and coring apples for them, checking greens for bugs, or any of that. She doesn't get upset because they are laying in dirt, scratching in the dirt, or eating dirt. If you toss a bucket of scraps in the main coop or run, she'll charge over getting her share, and the chicks will be eating whatever it is right beside her. So I'm not quite as particular. Treats are indeed like candy to a kid, but as long as the majority of their diet is what's in their feed dish, they should be fine. Treats are for occasional...and be sure they have access to grit if they are eating anything besides chick food. Mine get it from the clump of sod I toss in the brooder when they are just a few days old, and from being raised out in the run in a pen right along with the Big girls.