Newborn chicks

Just got my silkies in the mail today they should be 4 days old. They looked rough when they got here obviously so we brought them outside in the sun right off the bat and taught them to drink water. And now they are eating box elder bugs on the porch. I’ve only bought chicks from feed store so never had new ones. My question is is it okay they are picking up box elder bugs? They also have chick feed everywhere