We've given plain organic Greek yogurt to hens & chicks alike. W/ chicks we give only a tiny taste the first couple times & gradually increase quantity on a plastic spoon only as a treat. Too messy to leave out yogurt in a bowl for chicks or hens. Some written articles advise not to give dairy to chickens while others advise ok. So, we found no harm giving occasional dairy treats -- yogurt, cheese, sour cream, cream cheese, cottage cheese, unsalted butter. Beware that cheeses have high sodium content & we never feed flavored, sweetened, herbed, or fruited dairy to animals.Should I give the littles some yogurt also??