Sorry about the eye problem the one chick has. You might try posting about it in the Emergencies forum https://www.backyardchickens.com/f/10/emergencies-diseases-injuries-and-cures if you think it is an injury or needs to be treated. I've had several one eyed chickens in the flock, they do fine long term with only one eye, it isn't that uncommon a defect in chicks and occasionally one will injure itself.