I had a hen that went mental if you went anywhere near her and in the end she got so bad she ran all over the chicks if we went anywhere near the hut. She injured one of the chick so we took them away and gave them to another broody. They were 3 days old by this time and settled well with their new mum. Your hen might settle and might have fed the chicks but you have not seen this. All hens react differently. If you think she may kill the chicks you may have to remove them, l dont know your hen so cant advise the best thing to do. Our hen got over the loss of her chicks and has since made the best mum ever, now sitting on 7 turkey eggs. Had 2 lots of chicks last year. Good luck