Might want to try setting up toys like this, marked with red (to get their attention) or dots (to simulate "eyes") so the chicks fixate on the toys instead of one another: https://www.backyardchickens.com/threads/chick-pecking-other-chick.1430088/#post-23567316
I've only had them 2 days.. I don't remember this happening with my first batch of chicks (but there were other problems), I feel like I have the worst luck.