i got 6 barred rock chicks on Tuesday, they are 5 weeks old. i have been letting them out of the coop a couple times a day. While they love to roam around and eat whatever they find i have tried on several occasions to give them treats(strawberry's being the latest) yesterday i tried watermelon and cantaloupe. They don't seem to like any of them, except for small pieces of bread. Is this normal, will they like them when they get older?