Top chick hard to tell, could be a brown leghorn, could be a welsummer, could be a partridge rock, etc. Would need more pictures, standing would be good as well as a top and side view maybe.
Middle chicks look like Rhode Island Reds (RIR).
Bottom chick looks like an Easter Egger (EE). If it has puffy cheeks for sure EE, it's hard to tell from the side view but its legs are green which is a good indicator of EE.