I have 2-3.5 week old chicks. I'm new but learning quickly. They have chick grit coming. I have them on starter. They have been outside a few times and ate dirt grass etc. what can I use to start to train them to come To me and how? I have 8 babies. Still in brooder of course Moving to elevated coop in 2-3 weeks. I live in Indiana it's pretty warm here in early July.